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1. Development of a red absorbing Se-rhodamine photosensitizer and its application for bio-orthogonally activatable photodynamic therapy

Author:
Lv, Weijie; Chi, Siyu; Feng, Wenqi; Liang, Tao; Song, Dan; Liu, Zhihong
Source:
Chemical communications 2019 v.55 no.49 pp. 7037-7040
ISSN:
1364-548X
Subject:
photosensitizing agents,   etc   ; azides; chemical reactions; photochemotherapy;     Show all 4 Subjects
Abstract:
... A π-extended red absorbing Se-rhodamine (Se-NR) was synthesised and characterized. By masking the amine of Se-NR as an azide, we successfully constructed a bio-orthogonally activatable photosensitizer (Se-NR-Az). Se-NR-Az was not photocytotoxic, but when activated by the Staudinger reaction, photocytotoxicity was restored. ...
DOI:
10.1039/c9cc03018b

2. Superexchange in the fast lane – intramolecular electron transfer in a molecular triad occurs by conformationally gated superexchange

Author:
Luo, Yusen; Wächtler, Maria; Barthelmes, Kevin; Winter, Andreas; Schubert, Ulrich S.; Dietzek, Benjamin
Source:
Chemical communications 2019 v.55 no.36 pp. 5251-5254
ISSN:
1364-548X
Subject:
photosensitizing agents,   etc   ; chemical compounds; electron transfer; temperature;     Show all 4 Subjects
Abstract:
... Photoinduced electron transfer via hopping is generally considered to have a stronger temperature dependence than electron transfer via superexchange. However, in this work, an opposite trend of the temperature dependence is observed. This unexpected result is rationalized by considering the specific geometrical and electronic structure of the Ru-bis(terpyridine) photosensitizer. ...
DOI:
10.1039/c9cc01886g

3. Keratin nanoparticles co-delivering Docetaxel and Chlorin e6 promote synergic interaction between chemo- and photo-dynamic therapies

Author:
Gaio, Elisa; Guerrini, Andrea; Ballestri, Marco; Varchi, Greta; Ferroni, Claudia; Martella, Elisa; Columbaro, Marta; Moret, Francesca; Reddi, Elena
Source:
Journal of photochemistry and photobiology 2019
ISSN:
1011-1344
Subject:
photosensitizing agents,   etc   ; antimitotic agents; chlorins; cytotoxicity; keratin; nanoparticles; neoplasms; photochemotherapy;     Show all 8 Subjects
Abstract:
... The combination of chemotherapy and photodynamic therapy (PDT) is considered a valuable strategy for increasing therapeutic response in cancer treatment, and the re-formulation of pharmaceuticals in biocompatible nanoparticles (NPs) is particularly appealing for the possibility of co-loading drugs exerting cytotoxicity by different mechanisms, with the aim to produce synergic effects. We report th ...
DOI:
10.1016/j.jphotobiol.2019.111598

4. Photooxidation of phytosterols in oil matrix: Effects of the light, photosensitizers and unsaturation degree of the lipids

Author:
Zhao, Yajing; Yang, Bowen; Xu, Tao; Wang, Mengmeng; Lu, Baiyi
Source:
Food chemistry 2019 v.288 pp. 162-169
ISSN:
0308-8146
Subject:
photosensitizing agents,   etc   ; kinetics; light intensity; models; oils; oxides; photooxidation;     Show all 7 Subjects
Abstract:
... In this work we studied the stability of phytosterols in oil matrix under photooxidation (with different light intensity, existence/absence of photosensitizers and unsaturated lipids). Results revealed that the photooxidation of phytosterols fit a first order kinetic model (R2 > 0.96). When the intensity of light was higher, the rate constants increased and phytosterols oxidized faster. The progre ...
DOI:
10.1016/j.foodchem.2019.02.105

5. Unsaturation of the phospholipid side-chain influences its interaction with cyclodextrins: A spectroscopic exploration using a phenazinium dye

Author:
Sett, Riya; Paul, Bijan K.; Guchhait, Nikhil
Source:
Colloids and surfaces 2019 v.180 pp. 150-158
ISSN:
0927-7765
Subject:
photosensitizing agents,   etc   ; dyes; fluorescence; light scattering; phospholipids; spectroscopy;     Show all 6 Subjects
Abstract:
... The interaction of a cationic photosensitizer Safranin-O with liposome membranes having similar surface charge (negative) but differing in the presence of saturation on the lipid side-chain has been studied. To this end, dimyristoyl-l-R-phosphatidylglycerol (DMPG) and 1,2-dioleoyl-sn-glycero-3-phospho-(1′-rac-glycerol) (DOPG) phospholipids were employed to prepare small unilamellar vesicles. The d ...
DOI:
10.1016/j.colsurfb.2019.04.046

6. Current state of the nanoscale delivery systems for temoporfin-based photodynamic therapy: Advanced delivery strategies

Author:
Yakavets, Ilya; Millard, Marie; Zorin, Vladimir; Lassalle, Henri-Pierre; Bezdetnaya, Lina
Source:
Journal of controlled release 2019 v.304 pp. 268-287
ISSN:
0168-3659
Subject:
photosensitizing agents,   etc   ; carbon nanotubes; hydrophobicity; nanoparticles; neoplasms; photochemotherapy;     Show all 6 Subjects
Abstract:
... Enthusiasm for photodynamic therapy (PDT) as a promising technique to eradicate various cancers has increased exponentially in recent decades. The majority of clinically approved photosensitizers are hydrophobic in nature, thus, the effective delivery of photosensitizers at the targeted site is the main hurdle associated with PDT. Temoporfin (mTHPC, medicinal product name: Foscan®), is one of the ...
DOI:
10.1016/j.jconrel.2019.05.035

7. Photoinduced Charge Shift in Li⁺-Doped Giant Nested Fullerenes

Author:
Stasyuk, Anton J.; Stasyuk, Olga A.; Solà, Miquel; Voityuk, Alexander A.
Source:
Journal of physical chemistry 2019 v.123 no.27 pp. 16525-16532
ISSN:
1932-7455
Subject:
photosensitizing agents,   etc   ; absorption; density functional theory; encapsulation; energy; fullerene; lithium;     Show all 7 Subjects
Abstract:
... Over the last years, carbon nano-onions (CNOs) have been in focus in material science research. Their red-shifted absorption allows utilizing CNOs as promising photosensitizers. We report here a systematic study of excited state properties of six double-layered Li⁺-doped fullerenes of Iₕ symmetry: [Li@C₆₀@C₂₄₀]⁺, [Li@C₆₀@C₅₄₀]⁺, [Li@C₆₀@C₉₆₀]⁺, [Li@C₂₄₀@C₅₄₀]⁺, [Li@C₂₄₀@C₉₆₀]⁺, and [Li@C₅₄₀@C₉₆₀]⁺ ...
DOI:
10.1021/acs.jpcc.9b02354

8. 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

9. Optimized protocol for multigram preparation of emodin anthrone, a precursor in the hypericin synthesis

Author:
Gonçalves, Renato Sonchini; César, Gabriel Batista; Barbosa, Patrícia Magalhães; Hioka, Noboru; Nakamura, Celso Vataru; Bruschi, Marcos Luciano; Caetano, Wilker
Source:
Natural product research 2019 v.33 no.8 pp. 1196-1199
ISSN:
1478-6427
Subject:
photosensitizing agents,   etc   ; Hypericum; emodin; hypericin; reducing agents; screening; spectroscopy;     Show all 7 Subjects
Abstract:
... Emodin reduction to emodin anthrone comprise one of three process steps involved in the hypericin synthesis, a powerful natural photosensitiser found in plants of the genus Hypericum. In this communication, an optimized protocol was established for emodin reduction enabling an efficient multigram preparation of emodin anthrone. A screening of reducing agent (SnCl₂·2H₂O and HClcₒₙc) under different ...
DOI:
10.1080/14786419.2018.1457661

10. Red-to-blue photon up-conversion with high efficiency based on a TADF fluorescein derivative

Author:
Chen, Wenlong; Song, Fengling; Tang, Shanliang; Hong, Gaobo; Wu, Yingnan; Peng, Xiaojun
Source:
Chemical communications 2019 v.55 no.30 pp. 4375-4378
ISSN:
1364-548X
Subject:
photosensitizing agents,   etc   ; chemical compounds; chemical reactions; fluorescein; photons;     Show all 5 Subjects
Abstract:
... A new photon up-conversion system with a TADF fluorescein derivative as a photosensitizer was developed to achieve a quite large anti-Stokes shift from red to blue with a fairly high up-conversion emission quantum yield. This TADF photosensitizer has a very small ΔEST to provide a 207 nm anti-Stokes shift photon up-conversion. Meanwhile, it has a quite long triplet state lifetime (22.11 μs) and a ...
DOI:
10.1039/c9cc01868a

11. Synergistic catalysis for light-driven proton reduction using a polyoxometalate-based Cu–Ni heterometallic–organic framework

Author:
Sun, Wenlong; He, Cheng; Liu, Tao; Duan, Chunying
Source:
Chemical communications 2019 v.55 no.26 pp. 3805-3808
ISSN:
1364-548X
Subject:
photosensitizing agents,   etc   ; catalytic activity; copper; dehydrogenation; hydrogen production; nickel; synergism;     Show all 7 Subjects
Abstract:
... Synergistic effects of bimetallic Ni and Cu supported on metal–organic polymer composites based on Wells–Dawson P₂W₁₈O₆₂⁶⁻ clusters as photosensitizer units were identified, and we report a novel approach for addressing these issues for dehydrogenation and hydrogen production reactions. ...
DOI:
10.1039/c8cc09285k

12. Study of Singlet Oxygen Dynamics on Silicon Polymer Matrix

Author:
Hwang, Jeong-Wook; Jung, Seung-Jin; Heo, Il; Son, Hyun-A; Kim, Jong-Ho; Wang, Kang-Kyun; Kim, Yong-Rok
Source:
Journal of Analytical Methods in Chemistry (Online) 2019 v.2019
ISSN:
2090-8873
Subject:
photosensitizing agents,   etc   ; films (materials); phosphorescence; silicon; silicone; singlet oxygen; spectroscopy;     Show all 7 Subjects
Abstract:
... We report a detailed analysis of singlet oxygen generated from the photofunctional polymer film (PFPF) matrix which is the silicone polymer film (PDMS) embedded with a photosensitizer. Activation and deactivation dynamics of singlet oxygen generated from PFPFs were investigated with time-resolved phosphorescence spectroscopy. The singlet oxygen generated from PFPFs was dissipated into three differ ...
DOI:
10.1155/2019/2584686

13. Pathways for Improving the Photovoltaic Efficiency of Porphyrin and Phosphorene Antidot Lattice Nanocomposites: An Insight from a Theoretical Study

Author:
Kar, Moumita; Sarkar, Ritabrata; Pal, Sougata; Sarkar, Pranab
Source:
Journal of physical chemistry 2019 v.123 no.9 pp. 5303-5311
ISSN:
1932-7455
Subject:
photosensitizing agents,   etc   ; encapsulation; moieties; nanocomposites; porosity; porphyrins; solar cells;     Show all 7 Subjects
Abstract:
... The porosity of a newly synthesized phosphorene antidot lattice (PAL) is promising for encapsulating the porphyrin molecule and thus shows a versatile route to fabricate porphyrin/PAL nanocomposites. We herein explored the photovoltaic performance of a tetraphenylporphyrin (TPP)/PAL composite system. Interestingly, TPP/PAL composites show type-II staggered band alignment where a conduction band re ...
DOI:
10.1021/acs.jpcc.9b00697

14. Photoaddition reactions of N-benzylglycinates containing α-trimethylsilyl group with dimethyl acetylenedicarboxylate: competitive formation of pyrroles vs. β-enamino esters

Author:
Lim, Suk Hyun; Atar, Amol B.; Bae, Gunoh; Wee, Kyung-Ryang; Cho, Dae Won
Source:
RSC advances 2019 v.9 no.10 pp. 5639-5648
ISSN:
2046-2069
Subject:
photosensitizing agents,   etc   ; esters; fullerene; moieties; photoirradiation; pyrroles; secondary amines;     Show all 7 Subjects
Abstract:
... A study was conducted to gain insight into the preparative potential of photosensitized reactions of acyclic N-benzylglycinates containing an α-trimethylsilyl group with dimethyl acetylenedicarboxylate (DMAD). The photosensitizers employed in the reactions include 9,10-dicyanoanthracene (DCA), 1,4-dicyanonaphthalene (DCN), rose bengal (RB) and fullerene C₆₀. The results show that photoirradiation ...
DOI:
10.1039/c8ra09996k

15. Increasing the anti-Stokes shift in TTA upconversion with photosensitizers showing red-shifted spin-allowed charge transfer absorption but a non-compromised triplet state energy level

Author:
Wang, Zhijia; Zhao, Jianzhang; Di Donato, Mariangela; Mazzone, Gloria
Source:
Chemical communications 2019 v.55 no.10 pp. 1510-1513
ISSN:
1364-548X
Subject:
photosensitizing agents,   etc   ; absorption; chemical communication; chemical compounds; chemical reactions; energy;     Show all 6 Subjects
Abstract:
... Excitation into the spin-allowed S₀ → ¹CT absorption band of a spin–orbit charge transfer intersystem crossing (SOCT-ISC) triplet photosensitizer (PS) was used as a new strategy to increase the anti-Stokes shift in triplet–triplet annihilation (TTA) upconversion, with the advantages of red-shifted absorption but the non-compromised triplet state energy level of the triplet PS. ...
DOI:
10.1039/c8cc08159j

16. A sandwich-type polyoxometalate for efficient noble-metal-free hydrogen evolution upon visible light irradiation

Author:
Zhang, Guan-Hua; Yang, Wen-Bin; Wu, Wei-Ming; Wu, Xiao-Yuan; Zhang, Lei; Kuang, Xiao-Fei; Wang, Sa-Sa; Lu, Can-Zhong
Source:
Journal of catalysis 2019 v.369 pp. 54-59
ISSN:
0021-9517
Subject:
photosensitizing agents,   etc   ; fluorescein; hydrogen production; irradiation; spectral analysis; triethylamine;     Show all 6 Subjects
Abstract:
... A novel sandwich-type polyoxometalate, [NiII4(H2O)2(TiW9O34)2]12−(Ni4Ti2), has been developed for noble-metal-free hydrogen evolution reaction (HER). Employing a simple three-component catalytic system, with triethylamine as sacrificial donor and fluorescein as photosensitizer, Ni4Ti2 exhibits outstanding efficiency in hydrogen evolution upon visible light irradiation. The turnover number (TON) of ...
DOI:
10.1016/j.jcat.2018.08.023

17. 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

18. The role of irradiation source setups and indirect phototransformation: Kinetic aspects and the formation of transformation products of weakly sunlight-absorbing pesticides

Author:
Hensen, B.; Olsson, O.; Kümmerer, K.
Source:
The Science of the total environment 2019 v.695 pp. 133808
ISSN:
0048-9697
Subject:
photosensitizing agents,   etc   ; environmental factors; irradiation; mecoprop; models; nitrates; penconazole; photolysis; photons; solar radiation; terbutryn; xenon;     Show all 12 Subjects
Abstract:
... In this study, emission spectra of three different commonly used xenon irradiation sources were analyzed and compared for the first time to ascertain the most suitable setup to simulate natural solar radiation. In order to demonstrate setup differences, absolute photon fluxes of irradiation sources were received by actinometry. Verification was done by measuring quantum yields of the model compoun ...
DOI:
10.1016/j.scitotenv.2019.133808

19. Hybrid metal-organic nanoflowers and their application in biotechnology and medicine

Author:
Shcharbin, Dzmitry; Halets-Bui, Inessa; Abashkin, Viktar; Dzmitruk, Volha; Loznikova, Svetlana; Odabaşı, Mehmet; Acet, Ömür; Önal, Burcu; Özdemir, Nalan; Shcharbina, Natallia; Bryszewska, Maria
Source:
Colloids and surfaces 2019 v.182 pp. 110354
ISSN:
0927-7765
Subject:
photosensitizing agents,   etc   ; biocatalysis; biosensors; biotechnology; enzymes; genes; industry; medicine; nanocrystals; nanoflowers; nanoparticles; stabilizers; topography;     Show all 13 Subjects
Abstract:
... Nanoflowers – new nanostructures – have aroused the interest of scientists due to the topographic features of nanolayers, the special location of which allows a higher surface-to-volume ratio compared to classic spherical nanoparticles, which significantly increases the efficiency of surface reactions for nanoflowers. The main purpose of these types of nanomaterials is their use as enzyme stabiliz ...
DOI:
10.1016/j.colsurfb.2019.110354

20. Photobleaching Efficiency Parallels the Enhancement of Membrane Damage for Porphyrazine Photosensitizers

Author:
Tasso, Thiago T.; Schlothauer, Jan C.; Junqueira, Helena C.; Matias, Tiago A.; Araki, Koiti; Liandra-Salvador, Érica; Antonio, Felipe C. T.; Homem-de-Mello, Paula; Baptista, Mauricio S.
Source:
Journal of the American Chemical Society 2019 v.141 no.39 pp. 15547-15556
ISSN:
1520-5126
Subject:
photosensitizing agents,   etc   ; chemical bonding; energy conversion; magnesium; medical treatment; phospholipids; photobleaching; photostability; singlet oxygen; solvents; tissues;     Show all 11 Subjects
Abstract:
... Photostability is considered a key asset for photosensitizers (PS) used in medical applications as well as for those used in energy conversion devices. In light-mediated medical treatments, which are based on PS-induced harm to diseased tissues, the photoinduced cycle of singlet oxygen generation has always been considered to correlate with PS efficiency. However, recent evidence points to the fun ...
DOI:
10.1021/jacs.9b05991