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251. Blue photosensitizers for aPDT eliminate Aggregatibacter actinomycetemcomitans in the absence of light: An in vitro study

Author:
Valle, Luisa Andrade; Lopes, Marcelo Milanda Ribeiro; Zangrando, Mariana Schutzer Ragghianti; Sant'Ana, Adriana Campos Passanezi; Greghi, Sebastião Luiz Aguiar; de Rezende, Maria Lúcia Rubo; Damante, Carla Andreotti
Source:
Journal of photochemistry and photobiology 2019 v.194 pp. 56-60
ISSN:
1011-1344
Subject:
photosensitizing agents,   etc   ; Actinobacillus actinomycetemcomitans; adjuvants; analysis of variance; biofilm; data analysis; death; gentamicin; in vitro studies; methylene blue; periodontal diseases; photochemotherapy;     Show all 12 Subjects
Abstract:
... The main treatment of periodontal disease is the mechanical removal of supra and subgingival biofilm. Adjuvant therapies as antimicrobial photodynamic therapy (aPDT) may offer improved clinical and microbiological results. The aim of this in vitro study was to evaluate the effect of toluidine and methylene blue dyes, associated with red laser and LED, on elimination of a suspension of Aggregatibac ...
DOI:
10.1016/j.jphotobiol.2019.03.005

252. Blue/violet laser inactivates methicillin-resistant Staphylococcus aureus by altering its transmembrane potential

Author:
Biener, Gabriel; Masson-Meyers, Daniela S.; Bumah, Violet V.; Hussey, Grant; Stoneman, Michael R.; Enwemeka, Chukuka S.; Raicu, Valerica
Source:
Journal of photochemistry and photobiology 2017 v.170 pp. 118-124
ISSN:
1011-1344
Subject:
photosensitizing agents,   etc   ; NAD (coenzyme); antibiotic resistance; antimicrobial properties; blue light; chemical elements; fluorescence; iodides; irradiation; membrane potential; methicillin; methicillin-resistant Staphylococcus aureus; microscopes; porphyrins; therapeutics;     Show all 15 Subjects
Abstract:
... The resistance of methicillin-resistant Staphylococcus aureus to antibiotics presents serious clinical problems that prompted the need for finding alternative or combination therapies. One such therapy is irradiation with blue light. To determine the alterations in metabolic processes implicated in the observed antimicrobial effects of blue light, we investigated the changes in membrane potential ...
DOI:
10.1016/j.jphotobiol.2017.04.002

253. B–N Lewis Pair Functionalization of Anthracene: Structural Dynamics, Optoelectronic Properties, and O2 Sensitization

Author:
Liu, Kanglei; Lalancette, Roger A.; Jäkle, Frieder
Source:
Journal of the American Chemical Society 2017 v.139 no.50 pp. 18170-18173
ISSN:
1520-5126
Subject:
photosensitizing agents,   etc   ; anthracenes; energy; oxygen;     Show all 4 Subjects
Abstract:
... The judicial placement of main group elements in conjugated structures is emerging as a key route to novel functional hybrid materials. We demonstrate here that the formation of B–N Lewis pairs at the periphery of anthracene leads to buckling of the backbone while also dramatically lowering the LUMO energy. The resulting BN-substituted contorted polycyclic aromatic hydrocarbons show large bathochr ...
DOI:
10.1021/jacs.7b11062

254. Bodipy–Anthracene Dyads as Triplet Photosensitizers: Effect of Chromophore Orientation on Triplet-State Formation Efficiency and Application in Triplet–Triplet Annihilation Upconversion

Author:
Wang, Zhijia; Zhao, Jianzhang
Source:
Organic letters 2017 v.19 no.17 pp. 4492-4495
ISSN:
1523-7052
Subject:
photosensitizing agents,   etc   ; absorption; chemical reactions; chemical structure; geometry; organic compounds;     Show all 6 Subjects
Abstract:
... Bodipy–anthracene dyads with two chromophores assuming orthogonal geometry to enhance the spin-orbital charge-transfer intersystem crossing (SOCT-ISC) were prepared. The photosensitizers show strong absorption of visible light, efficient triplet-state formation (quantum yield 90%), and a long-lived triplet state (85 μs). The dipole moment orientation exerts significant effect on the ISC efficiency ...
DOI:
10.1021/acs.orglett.7b02047

255. BODIPY appended copper(ii) complexes for cellular imaging and singlet oxygen mediated anticancer activity in visible light

Author:
Bhattacharyya, Arnab; Dixit, Akanksha; Banerjee, Samya; Roy, Bijan; Kumar, Arun; Karande, Anjali A.; Chakravarty, Akhil R.
Source:
RSC advances 2016 v.6 no.106 pp. 104474-104482
ISSN:
2046-2069
Subject:
photosensitizing agents,   etc   ; X-ray diffraction; antineoplastic activity; apoptosis; copper; electrolytes; geometry; image analysis; inhibitory concentration 50; ligands; light; moieties; neoplasm cells; neoplasms; singlet oxygen; toxicity;     Show all 16 Subjects
Abstract:
... Copper(ii) complexes of N,N,N-donor dipicolylamine ligands, viz. [Cu(L¹)Cl₂] (1), [Cu(L²)Cl₂] (2) and [Cu(L³)Cl₂] (3) with L² and L³ having BODIPY (borondipyrromethene) moieties were synthesized, characterized and their photocytotoxicity studied. Complex 1 was structurally characterized by X-ray crystallography. It has copper(ii) in a distorted square-pyramidal geometry (τ = 0.11) with two chlorid ...
DOI:
10.1039/c6ra23118g

256. BODIPY–Au(I): A Photosensitizer for Singlet Oxygen Generation and Photodynamic Therapy

Author:
Üçüncü, Muhammed; Karakuş, Erman; Kurulgan Demirci, Eylem; Sayar, Melike; Dartar, Suay; Emrullahoğlu, Mustafa
Source:
Organic letters 2017 v.19 no.10 pp. 2522-2525
ISSN:
1523-7052
Subject:
photosensitizing agents,   etc   ; cell lines; chemical reactions; chemical structure; gold; median effective concentration; neoplasms; organic compounds; photochemotherapy; singlet oxygen;     Show all 10 Subjects
Abstract:
... Upon complexation with Au(I), a photoinactive BODIPY derivative was transformed into a highly photoactive triplet sensitizer. Along with high efficiency in singlet oxygen generation (ΦΔ = 0.84), the new BODIPY–Au(I) skeleton showed excellent photocytotoxic activity against cancer cell lines (EC₅₀ = 2.5 nM). ...
DOI:
10.1021/acs.orglett.7b00791

257. BODIPY-based macromolecular photosensitizer with selective recognition and enhanced anticancer efficiency

Author:
Lu, Zhentan; Zhang, Xinge; Wu, Zhongming; Zhai, Tingting; Xue, Yinan; Mei, Lin; Li, Chaoxing
Source:
RSC advances 2014 v.4 no.37 pp. 19495-19501
ISSN:
2046-2069
Subject:
photosensitizing agents,   etc   ; adverse effects; cancer therapy; cell viability; confocal laser scanning microscopy; cytotoxicity; lighting; neoplasm cells; neoplasms; photochemotherapy; singlet oxygen; water solubility;     Show all 12 Subjects
Abstract:
... Photodynamic therapy (PDT) is attracting ongoing attention for treatment of cancer as a noninvasive technique. A BODIPY-based macromolecular photosensitizer, p(GEMA-co-BODIPYMA)-2I, with high water solubility, specificity recognition to cancer cells and no dark cytotoxicity was prepared, which achieved enhanced therapeutic efficacy and reduced side-effects. P(GEMA-co-BODIPYMA)-2I generated ¹O₂ (ΦΔ ...
DOI:
10.1039/c4ra01412j

258. BODIPY-based photosensitizers with intense visible light harvesting ability and high ¹O₂ quantum yield in aqueous solution

Author:
Wu, Wenting; Geng, Ying; Fan, Weiyu; Li, Zhongtao; Zhan, Liying; Wu, Xueyan; Zheng, Jingtang; Zhao, Jianzhang; Wu, Mingbo
Source:
RSC advances 2014 v.4 no.93 pp. 51349-51352
ISSN:
2046-2069
Subject:
photosensitizing agents,   etc   ; aqueous solutions; light intensity; photooxidation; photostability; singlet oxygen;     Show all 6 Subjects
Abstract:
... A novel method to enhance the singlet oxygen quantum yield of photosensitizers in aqueous solution has been developed by introducing an electron-withdrawing group into BODIPY. B-2 was prepared based on this method and shows intense light harvesting ability (ε = 6.8 × 10⁴ M⁻¹ cm⁻¹ at 643 nm) and high ¹O₂ quantum yield in aqueous solution (Φ = 0.21). B-2 has been successfully used as an ¹O₂ sensitiz ...
DOI:
10.1039/c4ra08654f

259. Bodipy-based photosensitizers with long alkyl tails at the meso position: efficient singlet oxygen generation in Cremophor-EL micelles

Author:
Kilic, Bilal; Yesilgul, Nisa; Polat, Veli; Gercek, Zuhal; Akkaya, Engin U.
Source:
Tetrahedron letters 2016 v.57 pp. 1317-1320
ISSN:
0040-4039
Subject:
photosensitizing agents,   etc   ; aqueous solutions; chemical structure; derivatization; dyes; micelles; organic compounds; photosensitivity; singlet oxygen;     Show all 9 Subjects
Abstract:
... Bodipy dyes with n-decyloxyphenyl-(4, 5) and pentadecyl-(8) meso substituents can easily embed themselves into micellar structures formed from Cremophor-EL. In micelles of approximately 20nm median size, heavy-atom substituted dyes show remarkable photosensitization properties as evidenced by the rate of reaction with an anthracene-based selective singlet oxygen trap in buffered aqueous solutions. ...
DOI:
10.1016/j.tetlet.2016.02.033

260. BODIPY decorated dendrimeric cyclotriphosphazene photosensitizers: synthesis and efficient singlet oxygen generators

Author:
Eçik, Esra Tanrıverdi; Şenkuytu, Elif; Cebesoy, Zeynep; Çiftçi, Gönül Yenilmez
Source:
RSC advances 2016 v.6 no.53 pp. 47600-47606
ISSN:
2046-2069
Subject:
photosensitizing agents,   etc   ; absorbance; absorption; carbon; nuclear magnetic resonance spectroscopy; phosphorus; photostability; singlet oxygen; spectral analysis; stable isotopes;     Show all 10 Subjects
Abstract:
... In the present work, syntheses of BODIPY decorated dendrimeric cyclotriphosphazenes (8–10) are described. The newly synthesized dendrimeric cyclotriphosphazenes have been characterized by ¹H, ¹³C, ³¹P NMR spectroscopies, and UV-Vis electronic absorption spectra. These derivatives show absorption in the NIR region with good molar extinction coefficients. Singlet oxygen generation capacities of nove ...
DOI:
10.1039/c6ra07171f

261. Bodipy Derivatives as Organic Triplet Photosensitizers for Aerobic Photoorganocatalytic Oxidative Coupling of Amines and Photooxidation of Dihydroxylnaphthalenes

Author:
Huang, Ling; Zhao, Jianzhang; Guo, Song; Zhang, Caishun; Ma, Jie
Source:
Journal of organic chemistry 2013 v.78 no.11 pp. 5627-5637
ISSN:
1520-6904
Subject:
photosensitizing agents,   etc   ; absorption; amines; antibiotics; carbon-hydrogen bond activation; chemical structure; naphthoquinones; organic chemistry; photocatalysts; photooxidation; singlet oxygen;     Show all 11 Subjects
Abstract:
... We used iodo-Bodipy derivatives that show strong absorption of visible light and long-lived triplet excited states as organic catalysts for photoredox catalytic organic reactions. Conventionally most of the photocatalysts are based on the off-the-shelf compounds, usually showing weak absorption in the visible region and short triplet excited state lifetimes. Herein, the organic catalysts are used ...
DOI:
10.1021/jo400769u

262. Boosting Charge-Transfer Efficiency by Simultaneously Tuning Double Effects of Metal Nanocrystal in Z-Scheme Photocatalytic Redox System C

Author:
Jiang, Ke-Yi; Dai, Xiao-Cheng; Yu, Yan; Mo, Qiao-Ling; Xiao, Fang-Xing
Source:
Journal of physical chemistry 2018 v.122 no.23 pp. 12291-12306
ISSN:
1932-7455
Subject:
photosensitizing agents,   etc   ; amines; electron transfer; electrons; energy conversion; gold; ingredients; irradiation; mineralization; nanocrystals; nanogold; nitroaromatic compounds; photocatalysis; photosynthesis; physical chemistry; pollutants; solar energy; tungsten oxide;     Show all 18 Subjects
Abstract:
... Integrating individual functional materials into elegant nanoarchitectures holds great promise for creating high-efficiency photosynthesis systems with unique structure-directing merits. Herein, an all-solid-state metal-based Z-scheme photocatalytic system consisting of well-defined one-dimensional WO₃@Au@CdS core–shell heterostructure has been progressively and rationally designed by a green and ...
DOI:
10.1021/acs.jpcc.8b02895

263. Boosting Hot Electron-Driven Photocatalysis through Anisotropic Plasmonic Nanoparticles with Hot Spots in Au–TiO2 Nanoarchitectures

Author:
Sousa-Castillo, Ana; Comesaña-Hermo, Miguel; Rodríguez-González, Benito; Pérez-Lorenzo, Moisés; Wang, Zhiming; Kong, Xiang-Tian; Govorov, Alexander O.; Correa-Duarte, Miguel A.
Source:
The Journal of Physical Chemistry C 2016 v.120 no.21 pp. 11690-11699
ISSN:
1932-7455
Subject:
photosensitizing agents,   etc   ; electromagnetic field; electrons; gold; mathematical models; nanogold; nanoparticles; nanorods; nanospheres; photocatalysis; photosensitivity; physical chemistry; population growth; semiconductors; titanium dioxide;     Show all 15 Subjects
Abstract:
... The use of plasmonic metal nanoparticles as photosensitizers has undergone a strong development in the past few years given their ability to increase the activity of semiconductors into the visible and near-infrared regions. The present work reports an experimental and theoretical study on the critical influence that shape anisotropy of gold nanoparticles exerts on the photocatalytic performance o ...
DOI:
10.1021/acs.jpcc.6b02370

264. Boosting photocatalytic water oxidation achieved by BiVO4 coupled with iron-containing polyoxometalate: Analysis the true catalyst

Author:
Zheng, Min; Cao, Xiaohu; Ding, Yong; Tian, Tian; Lin, Junqi
Source:
Journal of catalysis 2018 v.363 pp. 109-116
ISSN:
0021-9517
Subject:
photosensitizing agents,   etc   ; catalysts; nanosheets; oxidation; photocatalysis; photolysis; photosynthesis;     Show all 7 Subjects
Abstract:
... In this work, BiVO4 is selected as effective light-harvesting material to replace conventional unstable dye-sensitized photosensitizer ([Ru(bpy)3]2+) that easily occurs photodecomposition during artificial photosynthetic system. The addition of an eleven iron-containing polyoxometalate (Fe11POM) as efficient cocatalyst illustrates a dramatically improved photocatalytic water oxidation performance ...
DOI:
10.1016/j.jcat.2018.04.022

265. Boosting the photocatalytic H₂ evolution activity of Fe₂O₃ polymorphs (α-, γ- and β-Fe₂O₃) by fullerene [C₆₀]-modification and dye-sensitization under visible light irradiation

Author:
Song, Ting; Zhang, Piyong; Zeng, Jian; Wang, Tingting; Ali, Atif; Zeng, Heping
Source:
RSC advances 2017 v.7 no.46 pp. 29184-29192
ISSN:
2046-2069
Subject:
photosensitizing agents,   etc   ; carbon nitride; electrons; ferric oxide; fluorescein; fullerene; hydrogen; hydrogen production; irradiation; nanocomposites; photocatalysis; photocatalysts;     Show all 12 Subjects
Abstract:
... C₆₀/Fe₂O₃ nanocomposites are successfully prepared, well characterized, and employed in visible-light-driven photocatalytic H₂ production. The Fe₂O₃ polymorphs show obvious broad-spectrum absorption, even close to the near infrared region (780–900 nm). The H₂ production rates of β-Fe₂O₃ and γ-Fe₂O₃ are almost 2.1 times and 3.1 times higher than α-Fe₂O₃ (which itself is close to that of g-C₃N₄). Th ...
DOI:
10.1039/c7ra03451b

266. Boron dipyrromethene (BODIPY)-based photosensitizers for photodynamic therapy

Author:
Awuah, Samuel G.; You, Youngjae
Source:
RSC advances 2012 v.2 no.30 pp. 11169-11183
ISSN:
2046-2069
Subject:
photosensitizing agents,   etc   ; boron; hyperkeratosis; macular degeneration; mechanism of action; neoplasms; oxygen; photochemotherapy;     Show all 8 Subjects
Abstract:
... Photodynamic therapy (PDT) has shown promise as an effective treatment modality for cancers and other localized diseases, such as age-related macular degeneration and actinic keratosis. PDT relies on light, photosensitizer and oxygen as elements in its mechanism of action. BODIPY photosensitizers that have been under extensive study over the past decade have been demonstrated as a new class of pho ...
DOI:
10.1039/c2ra21404k

267. “Bottom-Up” Construction of Hyperbranched Poly(prodrug-co-photosensitizer) Amphiphiles Unimolecular Micelles for Chemo-Photodynamic Dual Therapy

Author:
Sun, Pei; Wang, Nan; Jin, Xin; Zhu, Xinyuan
Source:
ACS applied materials & interfaces 2017 v.9 no.42 pp. 36675-36687
ISSN:
1944-8252
Subject:
photosensitizing agents,   etc   ; aqueous solutions; boron; chemical bonding; cytotoxicity; drug delivery systems; hydrophilicity; hydrophobicity; irradiation; micelles; moieties; photochemotherapy; singlet oxygen; surfactants;     Show all 14 Subjects
Abstract:
... Despite the great advantages of chemo-photodynamic combination therapy, tedious synthesis steps and laborious purification procedures make the fabrication of chemo-photodynamic combined therapeutic platforms rather difficult. In this study, we develop a facile “bottom-up” strategy to fabricate hyperbranched poly(prodrug-co-photosensitizer) amphiphiles, h-P(CPTMA-co-BYMAI)-b-POEGMA (hPCBE), for che ...
DOI:
10.1021/acsami.7b13055

268. Bovine serum albumin-capped gold nanoclusters conjugating with methylene blue for efficient 1O2 generation via energy transfer

Author:
Yamamoto, Masaki; Shitomi, Kanako; Miyata, Saori; Miyaji, Hirofumi; Aota, Hiroyuki; Kawasaki, Hideya
Source:
Journal of colloid and interface science 2018 v.510 pp. 221-227
ISSN:
0021-9797
Subject:
photosensitizing agents,   etc   ; absorption; blood serum; bovine serum albumin; cattle; energy transfer; lighting; methylene blue; nanogold; nanoparticles; photochemotherapy; singlet oxygen; solubility; toxicity; wavelengths; white light;     Show all 16 Subjects
Abstract:
... Bovine serum albumin (BSA)-capped gold nanoclusters (BSA-Au NCs) are attractive photosensitizers for efficient singlet oxygen ¹O2 generation owing to their high-water solubility, low toxicity, and the broad absorption from UV to visible wavelengths, and the long lifetime of the electronic excitations (of the order of microseconds). However, the ¹O2 generation efficiency of BSA-Au NCs is relatively ...
DOI:
10.1016/j.jcis.2017.09.011

269. Branched poly (lactic acid) microparticles for enhancing the 5-aminolevulinic acid phototoxicity

Author:
Di Martino, Antonio; Trusova, Marina E.; Postnikov, Pavel S.; Sedlarik, Vladimir
Source:
Journal of photochemistry and photobiology 2018 v.181 pp. 80-88
ISSN:
1011-1344
Subject:
photosensitizing agents,   etc   ; adsorption; aminolevulinic acid; biocompatibility; blood flow; cytotoxicity; emulsions; epithelium; humans; in vitro studies; irradiation; microparticles; neoplasm cells; photochemotherapy; phototoxicity; polylactic acid; solubility; surface proteins;     Show all 18 Subjects
Abstract:
... An innovative microcarrier based on a carboxy-enriched and branched polylactic acid derivative was developed to enhance the in vitro phototoxicity of the photosensitizer and prodrug 5-aminolevulinic. Microparticles, prepared by double emulsion technique and loaded with the prodrug were carefully characterized and the effect of the polymer structure on the chemical, physical and biological properti ...
DOI:
10.1016/j.jphotobiol.2018.03.001

270. Breaching the wall: morphological control of efficacy of phthalocyanine-based photoantimicrobials

Author:
Galstyan, Anzhela; Dobrindt, Ulrich
Source:
Journal of materials chemistry 2018 v.6 no.28 pp. 4630-4637
ISSN:
2050-7518
Subject:
photosensitizing agents,   etc   ; bacteria; cytotoxicity; lipophilicity; moieties; photochemotherapy; singlet oxygen; water solubility; zinc;     Show all 9 Subjects
Abstract:
... An efficient treatment of infections using antimicrobial photodynamic therapy (aPDT) anticipates that uptake of photosensitizer (PS) by bacterial cells is very fast and effective. In this work, the design, synthesis, characterization, and photodynamic activity of amphiphilic, water-soluble zinc(ii)phthalocyanine (Zn(ii)Pc) molecules bearing none, three or six thiophenyl moieties are described. We ...
DOI:
10.1039/c8tb01357h

271. Broadband Visible Light Harvesting N^N Pt(II) Bisacetylide Complex with Bodipy and Naphthalene Diimide Ligands: Förster Resonance Energy Transfer and Intersystem Crossing

Author:
Wang, Peili; Koo, Yun Hee; Kim, Woojae; Yang, Wenbo; Cui, Xiaoneng; Ji, Wei; Zhao, Jianzhang; Kim, Dongho
Source:
The Journal of Physical Chemistry C 2017 v.121 no.21 pp. 11117-11128
ISSN:
1932-7455
Subject:
photosensitizing agents,   etc   ; absorption; chemical structure; electrochemistry; energy transfer; ligands; naphthalene; photochemical reactions; toluene;     Show all 9 Subjects
Abstract:
... A N^N Pt(II) complex, Pt-1, with two heteroleptic ligands was prepared, which is a rarely reported molecular structure. The two different acetylide ligands, i.e., boron-dipyyromethane (BDP) and naphthalenediimide (NDI) chromophores, show strong absorption in the visible region. The photophysical properties of the complex were investigated by using steady-state and femtosecond/nanosecond time-resol ...
DOI:
10.1021/acs.jpcc.7b02188

272. Bromine-Sensitized Solar Photolysis of CO2 B

Author:
Braiman, Mark S.; Sailer-Kronlachner, Wilfried; Varjas, Christopher J.
Source:
The Journal of physical chemistry 2012 v.116 no.35 pp. 10430-10436
ISSN:
1520-5207
Subject:
photosensitizing agents,   etc   ; adsorbents; aluminum oxide; bromine; carbon dioxide; electron transfer; glass fibers; lighting; mass spectrometry; photolysis; photons; physical chemistry; silica gel; solar energy; solar radiation; titanium dioxide;     Show all 16 Subjects
Abstract:
... Direct photochemical reduction of CO₂ has generally been accomplished by using transition-metal compounds as electron transfer reagents. Here, we show that elemental bromine can function as an alternative photosensitizer. When sunlight is tightly focused on mixtures of CO₂ and Br₂, in the presence of a polar adsorbent such as silica gel, glass wool, alumina, or titania, a metastable red adduct is ...
DOI:
10.1021/jp208985y

273. Bromine-substituted p-nitrostilbene derivatives: synthesis, crystal structural studies, photoluminescence and the heavy atom effect on the singlet oxygen generation by two-photon absorption

Author:
Gao, Fang; Wang, Xinchao; Wang, Suna; Liu, Meng; Liu, Xiaojiao; Ye, Xiaojuan; Li, Hongru
Source:
Tetrahedron 2013 v.69 pp. 2720-2732
ISSN:
0040-4020
Subject:
photosensitizing agents,   etc   ; X-ray diffraction; absorption; bromine; chemical structure; crystals; irradiation; molecular models; optical properties; organic compounds; photoluminescence; photooxidation; singlet oxygen;     Show all 13 Subjects
Abstract:
... A variety of linear and side-chained p-nitrostilbene derivatives with various numbers of bromine atoms were prepared to survey the crystal structural properties, the photoluminescence, and heavy atom effect on the singlet oxygen generation by two-photo absorption (TPA). Single crystals of 4-nitro-4′-(4″-bromo-phenyl-methyl-oxy)-diphenylethylene (C2), 4-nitro-4′-(3″,5″-dibromo-phenyl-methyl-oxy)-di ...
DOI:
10.1016/j.tet.2013.02.010

274. Bromo-Substituted Diketopyrrolopyrrole Derivative with Specific Targeting and High Efficiency for Photodynamic Therapy

Author:
Cai, Yu; Tang, Qianyun; Wu, Xiujuan; Si, Weili; Zhang, Qi; Huang, Wei; Dong, Xiaochen
Source:
ACS applied materials 2016 v.8 no.17 pp. 10737-10742
ISSN:
1944-8252
Subject:
photosensitizing agents,   etc   ; hyaluronic acid; neoplasms; photochemotherapy; reactive oxygen species;     Show all 5 Subjects
Abstract:
... Novel photosensitizers with high reactive oxygen species generation and precise targeting to tumors are crucial for photodynamic therapy (PDT). Here, a bromo-substituted diketopyrrolopyrrole derivative (2,5-bis(6-bromohexyl)-3,6-bis(5-bromothiophene-2-yl)-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione)-grafted hyaluronic acid is synthesized, which presents excellent targeting and PDT efficiency both i ...
DOI:
10.1021/acsami.6b01533

275. BSA-exfoliated WSe₂ nanosheets as a photoregulated carrier for synergistic photodynamic/photothermal therapy

Author:
Jia, Xiaodan; Bai, Jing; Ma, Zhifang; Jiang, Xiue
Source:
Journal of materials chemistry B 2017 v.5 no.2 pp. 269-278
ISSN:
2050-7518
Subject:
photosensitizing agents,   etc   ; biocompatibility; bovine serum albumin; irradiation; methylene blue; nanosheets; neoplasm cells; neoplasms; photochemotherapy; photothermotherapy; singlet oxygen; stabilizers; synergism;     Show all 13 Subjects
Abstract:
... In this study, we present the synthesis and application of a new therapeutic platform based on photosensitizer-loaded, two-dimensional layered nanomaterials of WSe₂ for combined photothermal and photodynamic cancer therapy. WSe₂ nanosheets are synthesized by a simple and efficient chemical exfoliation using bovine serum albumin (BSA) as an effective exfoliating agent and strong stabilizing agent, ...
DOI:
10.1039/c6tb02525k

276. Cacalol and cacalol acetate as photoproducers of singlet oxygen and as free radical scavengers, evaluated by EPR spectroscopy and TBARS

Author:
Gómez-Vidales, Virginia; Granados-Oliveros, Gilma; Nieto-Camacho, Antonio; Reyes-Solís, Mirna; Jiménez-Estrada, Manuel
Source:
RSC advances 2013 v.4 no.3 pp. 1371-1377
ISSN:
2046-2069
Subject:
photosensitizing agents,   etc   ; acetates; electron paramagnetic resonance spectroscopy; free radical scavengers; free radicals; hydroxyl radicals; irradiation; lighting; neoplasms; oxygen; photochemotherapy; redox potential; reducing agents; singlet oxygen; thiobarbituric acid-reactive substances;     Show all 15 Subjects
Abstract:
... Photodynamic therapy (PDT) is an emerging cancer treatment based on the production of singlet oxygen (¹O₂) upon illumination of a photosensitizer in the presence of oxygen. Antioxidants are primarily reducing agents prone to scavenge reactive species in one way or another. Cacalol (C) and cacalol acetate (CA) were examined and compared regarding to their capacity to produce singlet oxygen and as s ...
DOI:
10.1039/c3ra42848f

277. Calcium phosphate-based organic–inorganic hybrid nanocarriers with pH-responsive on/off switch for photodynamic therapy

Author:
Nomoto, Takahiro; Fukushima, Shigeto; Kumagai, Michiaki; Miyazaki, Kozo; Inoue, Aki; Mi, Peng; Maeda, Yoshinori; Toh, Kazuko; Matsumoto, Yu; Morimoto, Yuji; Kishimura, Akihiro; Nishiyama, Nobuhiro; Kataoka, Kazunori
Source:
Biomaterials science 2016 v.4 no.5 pp. 826-838
ISSN:
2047-4849
Subject:
photosensitizing agents,   etc   ; aqueous solutions; aspartic acid; blood flow; calcium; calcium phosphates; chlorins; composite polymers; encapsulation; ions; mixing; molecular weight; nanocarriers; neoplasm cells; neoplasms; oxygen; pH; photochemistry; photochemotherapy; polyethylene glycol; tissues;     Show all 21 Subjects
Abstract:
... Photodynamic therapy (PDT) is a promising treatment modality for malignant tumors in a light-selective manner. To improve the PDT efficacy, numerous kinds of nanocarriers have been developed to deliver photosensitizers (PSs) selectively into the tumor through leaky tumor-associated vasculature. However, the corresponding prolonged retention of the nanocarrier in the bloodstream may lead to unfavor ...
DOI:
10.1039/c6bm00011h

278. Can BODIPY-Electron Acceptor Conjugates Act As Heavy Atom-Free Excited Triplet State and Singlet Oxygen Photosensitizers via Photoinduced Charge Separation-Charge Recombination Mechanism?

Author:
Hu, Wenbin; Liu, Mingyu; Zhang, Xian-Fu; Wang, Yaling; Wang, Yun; Lan, Haikuo; Zhao, Huaqing
Source:
Journal of physical chemistry 2019 v.123 no.26 pp. 15944-15955
ISSN:
1932-7455
Subject:
photosensitizing agents,   etc   ; electron transfer; energy; moieties; singlet oxygen; solvents;     Show all 6 Subjects
Abstract:
... To examine if BODIPY-electron acceptor conjugates can generate excited triplet state and singlet oxygen efficiently via a photoinduced charge separation–charge recombination (CS-CR) mechanism, seven compounds of BODIPY-electron acceptor (A) type are synthesized, in which an x-nitro-phenyl (x = ortho, meta, and para) or a pyridyl subunit on the BODIPY meso-position acts as the acceptor. The photoph ...
DOI:
10.1021/acs.jpcc.9b02961

279. Cancer cell membrane-coated magnetic nanoparticles for MR/NIR fluorescence dual-modal imaging and photodynamic therapy

Author:
Li, Jiong; Wang, Xuandong; Zheng, Dongye; Lin, Xinyi; Wei, Zuwu; Zhang, Da; Li, Zhuanfang; Zhang, Yun; Wu, Ming; Liu, Xiaolong
Source:
Biomaterials science 2018 v.6 no.7 pp. 1834-1845
ISSN:
2047-4849
Subject:
photosensitizing agents,   etc   ; biocompatibility; cell membranes; coatings; confocal laser scanning microscopy; flow cytometry; fluorescence; image analysis; irradiation; magnetism; mice; nanoparticles; neoplasm cells; neoplasms; photochemotherapy; staining;     Show all 16 Subjects
Abstract:
... Theranostic nanoprobes integrated with dual-modal imaging and therapeutic functions, such as photodynamic therapy (PDT), have exhibited significant potency in cancer treatments due to their high imaging accuracy and non-invasive advantages for cancer elimination. However, biocompatibility and highly efficient accumulation of these nanoprobes in tumor are still unsatisfactory for clinical applicati ...
DOI:
10.1039/c8bm00343b

280. Cancer-targeted reactive oxygen species-degradable polymer nanoparticles for near infrared light-induced drug release

Author:
Seah, Geok Leng; Yu, Jeong Heon; Koo, Bon Il; Lee, Dong Jae; Nam, Yoon Sung
Source:
Journal of materials chemistry B 2018 v.6 no.46 pp. 7737-7749
ISSN:
2050-7518
Subject:
photosensitizing agents,   etc   ; adenocarcinoma; adverse effects; antineoplastic agents; cytotoxicity; encapsulation; lighting; lungs; maximum tolerated dose; micelles; nanocarriers; nanoparticles; near infrared radiation; near-infrared spectroscopy; neoplasm cells; oxygen; paclitaxel; permeability; permissible exposure limit; polyethylene glycol; reactive oxygen species; silicon; tissues;     Show all 23 Subjects
Abstract:
... Nanocarriers can be translocated to the peripheral region of tumor tissues through the well-known enhanced permeability and retention effects. However, a high dose of nanocarriers need to be injected due to the low delivery efficiency of nanocarriers, which can also increase the side effects of off-targeted nanocarriers in normal tissues. It was demonstrated that on-demand drug release from tumor- ...
DOI:
10.1039/c8tb02323a

281. Can Rose Bengal resilience be used as a marker for photosynthetic resilience of Nannochloropsis oceanica strains in excess light environments?

Author:
Ben Sheleg, Avraham; Novoplansky, Nurit; Vonshak, Avigad
Source:
Algal research 2019 v.41 pp. 101562
ISSN:
2211-9264
Subject:
photosensitizing agents,   etc   ; Nannochloropsis; algae; mutants; photoinhibition; photons; photosystem II; radiation resistance; singlet oxygen; specific growth rate; temperature;     Show all 11 Subjects
Abstract:
... Singlet oxygen (1O2) is an interesting candidate for study due to the widely held opinion that it plays a key role in photoinhibition of photo system II (PSII). Many studies have been conducted to elucidate the exact role of singlet oxygen (1O2) in photo-damage/repair, photoprotection, oxidative protection, and signaling. However, few studies have addressed the potential role of singlet oxygen as ...
DOI:
10.1016/j.algal.2019.101562

282. Capacity of cationic and anionic porphyrins to inactivate the potential aquaculture pathogen Vibrio campbellii

Author:
Malara, Danilo; Hoj, Lone; Heimann, Kirsten; Citarrella, Gabriella; Oelgemöller, Michael
Source:
Aquaculture 2017 v.473 pp. 228-236
ISSN:
0044-8486
Subject:
photosensitizing agents,   etc   ; Penaeus monodon; Vibrio campbellii; aquaculture; bacteria; cytotoxicity; death; dose response; drug therapy; essential genes; irradiation; luminescence; models; pathogens; polymerase chain reaction; porphyrins; regrowth; sequence analysis; shrimp; singlet oxygen; virulence;     Show all 21 Subjects
Abstract:
... Photodynamic Antimicrobial Chemotherapy (PACT) has emerged as a promising method for pathogen eradication and control. PACT uses light excitation of non-toxic photosensitisers to produce singlet oxygen (1O2), which in turn damages and eradicates microbial cells. In the present study, a naturally luminescent Vibrio campbellii strain ISO7 (V. campbellii ISO7) was used as a model aquaculture pathogen ...
DOI:
10.1016/j.aquaculture.2017.02.015

283. Capillary electrophoretic studies on the photogenotoxic potential of pharmaceutical substances

Author:
Onoue, Satomi; Igarashi, Naoko; Kitagawa, Fumihiko; Otsuka, Koji; Tsuda, Yoshiko
Source:
Journal of chromatography 2008 v.1188 no.1 pp. 50-56
ISSN:
0021-9673
Subject:
photosensitizing agents,   etc   ; DNA damage; adverse effects; agarose; chromatography; deuterium; free radical scavengers; gel electrophoresis; phototoxicity; plasmids; prediction; singlet oxygen; sodium azide; transmission electron microscopy;     Show all 14 Subjects
Abstract:
... Drug-induced phototoxic skin responses, including photoirritation, photoallergy and photogenotoxicity, are identified as adverse reactions. In this study, we attempted to develop effective analytical tools to predict the photogenotoxic potential of pharmaceutical substances with the use of pBR322 DNA, a plasmid DNA. pBR322 DNA was irradiated with simulated solar light in the presence of photosensi ...
DOI:
10.1016/j.chroma.2007.09.084

284. Carbazole-based compounds containing aldehyde and cyanoacetic acid: optical properties and applications in photopolymerization

Author:
Abro, Hussain Ahmed; Zhou, Tengfei; Han, Weixiang; Xue, Tanlong; Wang, Tao
Source:
RSC advances 2017 v.7 no.87 pp. 55382-55388
ISSN:
2046-2069
Subject:
photosensitizing agents,   etc   ; absorption; acrylic acid; active ingredients; density functional theory; dyes; energy; optical properties; photochemical reactions; polymerization;     Show all 10 Subjects
Abstract:
... Carbazole-based dyes containing aldehyde and cyanoacetic acid groups were synthesized through Sonogashira coupling and Knoevenagel reactions. These compounds included 6-((4-(diphenylamino)phenyl)ethynyl)-9-ethyl-9H-carbazole-3-carbaldehyde (CCC), 9-ethyl-6-((9-ethyl-9H-carbazol-3-yl)ethynyl)-9H-carbazole-3-carbaldehyde (TCC), (E)-2-cyano-3-(9-ethyl-6-((9-ethyl-9H-carbazol-3-yl)ethynyl)-9H-carbazol ...
DOI:
10.1039/c7ra11887b

285. Carbon dot-DNA-protoporphyrin hybrid hydrogel for sustained photoinduced antimicrobial activity

Author:
Kumari, Sonam; Rajit Prasad, Surendra; Mandal, Debabrata; Das, Prolay
Source:
Journal of colloid and interface science 2019 v.553 pp. 228-238
ISSN:
0021-9797
Subject:
photosensitizing agents,   etc   ; Gram-positive bacteria; Staphylococcus aureus; antimicrobial properties; carbon; chemical bonding; cytosine; energy transfer; fluorescence; hydrogels; irradiation; pH; photochemotherapy; protoporphyrin; reactive oxygen species; single-stranded DNA; solubility; ultraviolet radiation;     Show all 18 Subjects
Abstract:
... An assembly of hybrid hydrogel derived from Carbon Dot (CD), Protoporphyrin IX (PpIX) and DNA is reported here. PpIX and CD were covalently conjugated to 5′-phosphate termini of Cytosine (C) rich single strand DNA (ssDNA) separately. The CD-DNA-PpIX hybrid hydrogel was assembled through the formation of intercalated motif (i-motif) DNA network structure from CD-DNA and PpIX-DNA conjugates where CD ...
DOI:
10.1016/j.jcis.2019.06.034

286. Carbon dots as photosensitisers for solar-driven catalysis

Author:
HuttonThese authors contributed equally., Georgina A. M.; Martindale, Benjamin C. M.; Reisner, Erwin
Source:
Chemical Society reviews 2017 v.46 no.20 pp. 6111-6123
ISSN:
1460-4744
Subject:
photosensitizing agents,   etc   ; carbon quantum dots; catalysts; electron transfer; energy conversion; fuel production; fuels; photocatalysis; photoluminescence; photosynthesis; production technology; solar energy;     Show all 12 Subjects
Abstract:
... Artificial photosynthesis is the mimicry of the natural process of solar energy conversion into chemical energy carriers. Photocatalytic systems that combine light-harvesting materials and catalysts in solution or suspension provide a promising route towards this goal. A key requirement for a sustainable solar fuel production system is a low-cost, stable and non-toxic light harvester. Photolumines ...
DOI:
10.1039/c7cs00235a

287. Carbon Dots as Versatile Photosensitizers for Solar-Driven Catalysis with Redox Enzymes

Author:
Hutton, Georgina A. M.; Reuillard, Bertrand; Martindale, Benjamin C. M.; Caputo, Christine A.; Lockwood, Colin W. J.; Butt, Julea N.; Reisner, Erwin
Source:
Journal of the American Chemical Society 2016 v.138 no.51 pp. 16722-16730
ISSN:
1520-5126
Subject:
photosensitizing agents,   etc   ; carbon quantum dots; electrons; electrostatic interactions; ferredoxin hydrogenase; hydrogen; hydrogenation; photocatalysis; photostability; photosynthesis; protons; solubility; succinate dehydrogenase (quinone); succinic acid; toxicity;     Show all 15 Subjects
Abstract:
... Light-driven enzymatic catalysis is enabled by the productive coupling of a protein to a photosensitizer. Photosensitizers used in such hybrid systems are typically costly, toxic, and/or fragile, with limited chemical versatility. Carbon dots (CDs) are low-cost, nanosized light-harvesters that are attractive photosensitizers for biological systems as they are water-soluble, photostable, nontoxic, ...
DOI:
10.1021/jacs.6b10146

288. Carbon Dot–SnS₂ Heterojunction Photocatalyst for Photoreduction of Cr(VI) under Visible Light: A Combined Experimental and First-Principles DFT Study

Author:
Han, Liu; Zhong, Yun-lei; Lei, Kai; Mao, Dong; Dong, You-zhen; Hong, Guo; Zhou, Ying-tang; Fang, Dong
Source:
Journal of physical chemistry 2019 v.123 no.4 pp. 2398-2409
ISSN:
1932-7455
Subject:
photosensitizing agents,   etc   ; carbon; chromium; density functional theory; durability; electrons; energy; heavy metals; nanocomposites; photocatalysis; photocatalysts; physical chemistry; pollution; solar energy; toxicity;     Show all 15 Subjects
Abstract:
... The use of solar energy to convert highly toxic Cr(VI) into hypotoxic Cr(III) is an attractive strategy to address heavy metal pollution. In this work, a facile method for the preparation of carbon nanodot–SnS₂ nanocomposites (SnSCD) is reported. In this system, CDs serve as excellent photosensitizers in combination with SnS₂. The photogenerated electrons produced by the conduction band of SnS₂ co ...
DOI:
10.1021/acs.jpcc.8b10059

289. Carbon nanodots featuring efficient FRET for two-photon photodynamic cancer therapy with a low fs laser power density

Author:
Wang, Jing; Zhang, Zehui; Zha, Shuai; Zhu, Yinyan; Wu, Peiyi; Ehrenberg, Benjamin; Chen, Ji-Yao
Source:
Biomaterials 2014 v.35 no.34 pp. 9372-9381
ISSN:
0142-9612
Subject:
photosensitizing agents,   etc   ; absorption; carbon quantum dots; electrostatic interactions; energy transfer; fluorescence; human cell lines; moieties; neoplasms; oxygen production; photochemotherapy; porphyrins; singlet oxygen; wavelengths;     Show all 14 Subjects
Abstract:
... The 5,10,15,20-tetrakis(1-methyl 4-pyridinio) porphyrins (TMPyP), a photosensitizer used for photodynamic therapy of cancers (PDT), were linked to carbon dots (CDots) to form the conjugates of CDot–TMPyP by the electrostatic force. The 415 nm emission band of CDots was well overlapped with the absorption band of TMPyP, so that the Cdots in conjugates can work as donor to transfer the energy to TMP ...
DOI:
10.1016/j.biomaterials.2014.07.063

290. Carbon Nano-onions as Photosensitizers: Stacking-Induced Red-Shift C

Author:
Hashmi, Muhammad Ali; Lein, Matthias
Source:
Journal of physical chemistry 2018 v.122 no.4 pp. 2422-2431
ISSN:
1932-7455
Subject:
photosensitizing agents,   etc   ; absorption; energy; fullerene;     Show all 4 Subjects
Abstract:
... We have investigated the double-layered carbon nano-onions (CNOs) C₂₀@C₆₀, C₂₀@C₈₀, C₆₀@C₁₈₀, C₆₀@C₂₄₀, C₈₀@C₂₄₀, and C₂₄₀@C₅₄₀ as well as their triple-layered analogues C₆₀@C₂₄₀@C₅₄₀ and C₈₀@C₂₄₀@C₅₄₀ with high-level electronic structure calculations. We were able to show that earlier work, which showed the free rotation of the inner fullerene in a CNO, does not extend to multilayered CNOs. We sh ...
DOI:
10.1021/acs.jpcc.7b11421

291. Carbon@polypyrrole nanotubes as a photosensitizer in laser phototherapy of Pseudomonas aeruginosa

Author:
Tondro, G.H.; Behzadpour, N.; Keykhaee, Z.; Akbari, N.; Sattarahmady, N.
Source:
Colloids and surfaces 2019 v.180 pp. 481-486
ISSN:
0927-7765
Subject:
photosensitizing agents,   etc   ; Gram-negative bacteria; Pseudomonas aeruginosa; antibacterial properties; antibiotic resistance; carbon nanotubes; cell viability; coatings; infectious diseases; irradiation; near infrared radiation; nucleic acids; photochemotherapy; pyrroles; reactive oxygen species; temperature; wavelengths;     Show all 17 Subjects
Abstract:
... Phototherapy has been offered as an alternative and promising antibacterial strategy to overcome the antibiotic resistance problem. This study evaluated the antibacterial and phototherapy effects of carbon nanotubes with a polypyrrole coating in a core@shell structure (CNTs@PPy) on Pseudomonas aeruginosa (P. aeruginosa). P. aeruginosa was treated with CNTs@PPy at different concentrations (50–500 μ ...
DOI:
10.1016/j.colsurfb.2019.05.020

292. Carbon quantum dots/TiO₂ composites for efficient photocatalytic hydrogen evolution

Author:
Yu, Huijun; Zhao, Yufei; Zhou, Chao; Shang, Lu; Peng, Yong; Cao, Yinhu; Wu, Li-Zhu; Tung, Chen-Ho; Zhang, Tierui
Source:
Journal of materials chemistry A 2014 v.2 no.10 pp. 3344-3351
ISSN:
2050-7496
Subject:
photosensitizing agents,   etc   ; carbon quantum dots; catalysts; electric current; hydrogen; hydrogen production; hydroxyl radicals; irradiation; light; photocatalysis; titanium dioxide; ultraviolet-visible spectroscopy;     Show all 12 Subjects
Abstract:
... Carbon quantum dots modified P25 TiO₂ composites (CQDs/P25) with a “dyade”-like structure were prepared via a facile one-step hydrothermal reaction. CQDs/P25 exhibited improved photocatalytic H₂ evolution under UV-Vis and visible light (λ > 450 nm) irradiation without loading any noble metal cocatalyst, compared to pure P25. A possible mechanism of the photocatalytic H₂ production activity over CQ ...
DOI:
10.1039/c3ta14108j

293. Carnosine-graphene oxide conjugates decorated with hydroxyapatite as promising nanocarrier for ICG loading with enhanced antibacterial effects in photodynamic therapy against Streptococcus mutans

Author:
Gholibegloo, Elham; Karbasi, Ashkan; Pourhajibagher, Maryam; Chiniforush, Nasim; Ramazani, Ali; Akbari, Tayebeh; Bahador, Abbas; Khoobi, Mehdi
Source:
Journal of photochemistry and photobiology 2018 v.181 pp. 14-22
ISSN:
1011-1344
Subject:
photosensitizing agents,   etc   ; Fourier transform infrared spectroscopy; Streptococcus mutans; X-ray diffraction; antibacterial properties; bacterial contamination; biofilm; energy-dispersive X-ray analysis; genes; gentian violet; graphene oxide; hydroxyapatite; nanocarriers; photochemotherapy; quantitative polymerase chain reaction; scanning electron microscopy; ultraviolet-visible spectroscopy; zeta potential;     Show all 18 Subjects
Abstract:
... Antimicrobial photodynamic therapy (aPDT) has been emerged as a noninvasive strategy to remove bacterial contaminants such as S. mutans from the tooth surface. Photosensitizer (PS), like indocyanine green (ICG), plays a key role in this technique which mainly suffers from the poor stability and concentration-dependent aggregation. An appropriate nanocarrier (NC) with enhanced antibacterial effects ...
DOI:
10.1016/j.jphotobiol.2018.02.004

294. Carrier-Free, Chemophotodynamic Dual Nanodrugs via Self-Assembly for Synergistic Antitumor Therapy

Author:
Zhang, Ruiyun; Xing, Ruirui; Jiao, Tifeng; Ma, Kai; Chen, Chengjun; Ma, Guanghui; Yan, Xuehai
Source:
ACS Applied Materials & Interfaces 2016 v.8 no.21 pp. 13262-13269
ISSN:
1944-8252
Subject:
photosensitizing agents,   etc   ; chlorine; doxorubicin; drug therapy; encapsulation; hydrophobic bonding; immune response; inflammation; nanoparticles; neoplasms; permeability;     Show all 11 Subjects
Abstract:
... There are tremendous challenges from both tumor and its therapeutic formulations affecting the effective treatment of tumor, including tumor recurrence, and complex multistep preparations of formulation. To address these issues, herein a simple and green approach based on the self-assembly of therapeutic agents including a photosensitizer (chlorine e6, Ce6) and a chemotherapeutic agent (doxorubici ...
DOI:
10.1021/acsami.6b02416

295. C70 as a Photocatalyst for Oxidation of Secondary Benzylamines to Imines

Author:
Kumar, Rakesh; Gleißner, Eva H.; Tiu, Elisha Gabrielle V.; Yamakoshi, Yoko
Source:
Organic letters 2016 v.18 no.2 pp. 184-187
ISSN:
1523-7052
Subject:
photosensitizing agents,   etc   ; Lewis bases; benzoquinones; chemical structure; chromatography; energy; imines; oxidation; photocatalysts; photosensitivity; singlet oxygen; superoxide anion;     Show all 12 Subjects
Abstract:
... Photosensitive C₇₀ was used for the catalytic oxidation of benzylamines to the corresponding imines. The advantages of using C₇₀ compared to C₆₀ or other commonly used photosensitizers such as tetraphenylporphyrin (TPP) are (1) faster reaction rates, especially under lower energy of light sources, (2) clean reactions with simple workup without chromatography, and (3) lower catalyst loadings. The r ...
DOI:
10.1021/acs.orglett.5b03194

296. Catalysis of Nickel Ferrite for Photocatalytic Water Oxidation Using [Ru(bpy)3]2+ and S2O82–

Author:
Hong, Dachao; Yamada, Yusuke; Nagatomi, Takaharu; Takai, Yoshizo; Fukuzumi, Shunichi
Source:
Journal of the American Chemical Society 2012 v.134 no.48 pp. 19572-19575
ISSN:
1520-5126
Subject:
photosensitizing agents,   etc   ; catalysts; catalytic activity; cobalt; ferrimagnetic materials; iron; nickel; oxidants; oxidation; oxides; oxygen; photosynthesis; superoxide anion;     Show all 13 Subjects
Abstract:
... Single or mixed oxides of iron and nickel have been examined as catalysts in photocatalytic water oxidation using [Ru(bpy)₃]²⁺ as a photosensitizer and S₂O₈²– as a sacrificial oxidant. The catalytic activity of nickel ferrite (NiFe₂O₄) is comparable to that of a catalyst containing Ir, Ru, or Co in terms of O₂ yield and O₂ evolution rate under ambient reaction conditions. NiFe₂O₄ also possesses ro ...
DOI:
10.1021/ja309771h

297. Catalytic chemistry of glucose oxidase in cancer diagnosis and treatment

Author:
FuThese two authors contributed equally., Lian-Hua; Qi, Chao; Lin, Jing; Huang, Peng
Source:
Chemical Society reviews 2018 v.47 no.17 pp. 6454-6472
ISSN:
1460-4744
Subject:
photosensitizing agents,   etc   ; acidity; biocompatibility; biomarkers; biosensors; catalytic activity; gluconic acid; glucose; glucose oxidase; hydrogen peroxide; hydroxyl radicals; hypoxia; irradiation; medicine; neoplasm cells; neoplasms; oxidation; oxidative stress; oxygen; photochemotherapy; photothermotherapy; toxicity;     Show all 22 Subjects
Abstract:
... Glucose oxidase (GOx) is an endogenous oxido-reductase that is widely distributed in living organisms. Over recent years, GOx has attracted increasing interest in the biomedical field due to its inherent biocompatibility, non-toxicity, and unique catalysis against β-d-glucose. GOx efficiently catalyzes the oxidization of glucose into gluconic acid and hydrogen peroxide (H₂O₂), which can be employe ...
DOI:
10.1039/c7cs00891k

298. Catalytic Light-Driven Generation of Hydrogen from Water by Iron Dithiolene Complexes

Author:
Lv, Hongjin; Ruberu, T. Purnima A.; Fleischauer, Valerie E.; Brennessel, William W.; Neidig, Michael L.; Eisenberg, Richard
Source:
Journal of the American Chemical Society 2016 v.138 no.36 pp. 11654-11663
ISSN:
1520-5126
Subject:
photosensitizing agents,   etc   ; ascorbic acid; catalysts; catalytic activity; hydrogen; hydrogen production; iron; irradiation; ligands; light; photosynthesis; protons;     Show all 12 Subjects
Abstract:
... The development of active, robust systems for light-driven hydrogen production from aqueous protons based on catalysts and light absorbers composed solely of earth abundant elements remains a challenge in the development of an artificial photosynthetic system for water splitting. Herein, we report the synthesis and characterization of four closely related Fe bis(benzenedithiolate) complexes that e ...
DOI:
10.1021/jacs.6b05040

299. Catch and Release Photosensitizers: Combining Dual-Action Ruthenium Complexes with Protease Inactivation for Targeting Invasive Cancers

Author:
Arora, Karan; Herroon, Mackenzie; Al-Afyouni, Malik H.; Toupin, Nicholas P.; Rohrabaugh, Thomas N.; Loftus, Lauren M.; Podgorski, Izabela; Turro, Claudia; Kodanko, Jeremy J.
Source:
Journal of the American Chemical Society 2018 v.140 no.43 pp. 14367-14380
ISSN:
1520-5126
Subject:
photosensitizing agents,   etc   ; breast neoplasms; breasts; cell death; cell viability; collagen; cysteine proteinase inhibitors; cysteine proteinases; dissociation; epithelial cells; fluorescent dyes; humans; image analysis; irradiation; ligands; light; metastasis; neoplasm cells; photochemistry; photochemotherapy; proteolysis; ruthenium; singlet oxygen;     Show all 23 Subjects
Abstract:
... Dual action agents containing a cysteine protease inhibitor and Ru-based photosensitizer for photodynamic therapy (PDT) were designed, synthesized, and validated in 2D culture and 3D functional imaging assays of triple-negative human breast cancer (TNBC). These combination agents deliver and release Ru-based PDT agents to tumor cells and cause cancer cell death upon irradiation with visible light, ...
DOI:
10.1021/jacs.8b08853

300. Cationic benzylidene cyclopentanone photosensitizers for selective photodynamic inactivation of bacteria over mammalian cells

Author:
Fang, Yanyan; Liu, Tianlong; Zou, Qianli; Zhao, Yuxia; Wu, Feipeng
Source:
RSC advances 2015 v.5 no.69 pp. 56067-56074
ISSN:
2046-2069
Subject:
photosensitizing agents,   etc   ; Escherichia coli; Staphylococcus aureus; antibiotic resistance; antimicrobial properties; bacteria; human cell lines; mammals; methylene blue; minimum inhibitory concentration; photochemotherapy;     Show all 11 Subjects
Abstract:
... To inactivate both standard strains as well as antibiotic-resistant strains of bacteria with minimum damage to host cells, three new pyridyl cationic-modified benzylidene cyclopentanone photosensitizers (PSs), P1 (with one cationic group), P2 (with two cationic groups arranged bilaterally), and P3 (with two cationic groups arranged unilaterally) were synthesized and characterized. Their selective ...
DOI:
10.1039/c5ra06143a