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1. Modular functionalization and hydrogel formation via red-shifted and self-reporting [2+2] cycloadditions

Author:
Ludwanowski, Simon; Hoenders, Daniel; Kalayci, Kubra; Frisch, Hendrik; Barner-Kowollik, Christopher; Walther, Andreas
Source:
Chemical communications 2021 v.57 no.6 pp. 805-808
ISSN:
1364-548X
Subject:
irradiation,   etc   ; hydrogels; hydrophilicity;     Show all 3 Subjects
Abstract:
... We present a modularly applicable, red-shifted and self-reporting photodynamic covalent crosslinker, abbreviated qStyPy, that performs [2+2] cycloadditions upon irradiation with 470 nm in water. The rational design of qStyPy increases its hydrophilicity due to a permanent charge and features a broad emission in the far-red/near-infrared regime as a readout for the cycloadduct formation, rendering ...
DOI:
10.1039/d0cc07429b

2. Nonylphenol photodegradation by novel ternary MIL-100(Fe)/ZnFe2O4/PCN composite under visible light irradiation via double charge transfer process

Author:
Xu, Kailin; Jiao, Li; Wang, Chuqiao; Bu, Yiming; Tang, Yuling; Qiu, Liwei; Zhang, Qiuya; Wang, Liping
Source:
Journal of environmental sciences (China) 2022 v.111 pp. 93-103
ISSN:
1001-0742
Subject:
irradiation,   etc   ; active ingredients; ambient temperature; bioaccumulation; carbon nitride; groundwater; human health; light; nonylphenols; photocatalysis; photolysis; reaction mechanisms; sewage; surface water; China;     Show all 15 Subjects
Abstract:
... Nonylphenol (NP) residues, as a typical endocrine disrupting chemical (EDC), frequently exist in sewage, surface water, groundwater and even drinking water, which poses a serious threat to human health due to its bioaccumulation. In order to remove NP, a series of MIL-100(Fe)/ZnFe₂O₄/flake-like porous carbon nitride (MIL/ZC) was synthesized through in-situ synthesis at room temperature. High perfo ...
DOI:
10.1016/j.jes.2021.03.020

3. Controlling the coordination environment of Co atoms derived from Co/ZIF-8 for boosting photocatalytic H2 evolution of CdS

Author:
Ji, Qingjie; Xu, Jixiang; Wang, Chao; Wang, Lei
Source:
Journal of colloid and interface science 2021 v.596 pp. 139-147
ISSN:
0021-9797
Subject:
irradiation,   etc   ; graphene; hydrogen production; photocatalysis;     Show all 4 Subjects
Abstract:
... Regulating the coordination environment of metal–Nₓ species by replacing N with low electronegativity atoms is an approach of tuning the electrocatalytic performance of metal-based sites. However, such effects on the enhancement of photocatalytic H₂ evolution over semiconductors are not discussed yet. Herein, we designed and prepared Co-based cocatalysts with controlled coordination environment vi ...
DOI:
10.1016/j.jcis.2021.03.124

4. Asymmetric [2+2] photocycloaddition via charge transfer complex for the synthesis of tricyclic chiral ethers

Author:
Martínez-Gualda, Ana M.; Domingo-Legarda, Pablo; Rigotti, Thomas; Díaz-Tendero, Sergio; Fraile, Alberto; Alemán, José
Source:
Chemical communications 2021 v.57 no.24 pp. 3046-3049
ISSN:
1364-548X
Subject:
irradiation,   etc   ; light; photocatalysis; stereoselective synthesis;     Show all 4 Subjects
Abstract:
... The asymmetric synthesis of chiral polycyclic ethers by an intramolecular [2+2] photocycloaddition is described. This process proceeded through a photocatalytically active iminium ion-based charge transfer (CT) complex under visible light irradiation. In this way a stereocontrolled [2+2] photocycloaddition is enabled leading to tricyclic products with good enantiomeric ratios. ...
DOI:
10.1039/d1cc00035g

5. Elimination of macrophage-entrapped antibiotic-resistant bacteria by a targeted metal–organic framework-based nanoplatform

Author:
Liu, Xuemeng; Deng, Qingqing; Zhang, Lu; Sang, Yanjuan; Dong, Kai; Ren, Jinsong; Qu, Xiaogang
Source:
Chemical communications 2021 v.57 no.23 pp. 2903-2906
ISSN:
1364-548X
Subject:
irradiation,   etc   ; antibiotic resistance; photosensitizing agents;     Show all 3 Subjects
Abstract:
... A novel metal–organic framework-based platform was designed and constructed for photosensitizer delivery for the elimination of intracellular antibiotic-resistant bacteria. With the merit of targeting and internalizing ability, the system could kill the stealthy bacteria efficiently under light irradiation. ...
DOI:
10.1039/d0cc08340b

6. Blue circularly polarized luminescent amorphous molecules with single-handed propeller chirality induced by circularly polarized light irradiation

Author:
Zhang, Zhaoming; Harada, Takunori; Pietropaolo, Adriana; Wang, Yuting; Wang, Yue; Hu, Xiao; He, Xuehan; Chen, Hui; Song, Zhiyi; Bando, Masayoshi; Nakano, Tamaki
Source:
Chemical communications 2021 v.57 no.14 pp. 1794-1797
ISSN:
1364-548X
Subject:
irradiation,   etc   ; luminescence; optical isomerism; propellers;     Show all 4 Subjects
Abstract:
... Preferred-handed propeller conformation was induced by circularly polarized light irradiation to three amorphous molecules with trigonal symmetry, and the molecules with induced chirality efficiently exhibited blue circularly polarized luminescence. In both chirality induction and luminescence, chirality appeared to be amplified due to intermolecular interactions through π-stacking. ...
DOI:
10.1039/d0cc07898k

7. Photo-induced radical borylation of hemiacetals via C–C bond cleavage

Author:
Liu, Qianyi; Zhang, Jianning; Zhang, Lei; Mo, Fanyang
Source:
Tetrahedron 2021 v.80 pp. 131867
ISSN:
0040-4020
Subject:
irradiation,   etc   ; cleavage (chemistry); light; yields;     Show all 4 Subjects
Abstract:
... In this study, we reported a photo-induced radical borylation of hemiacetal derivatives via C–C bond cleavage. This transformation can be realized under mild conditions with simple reaction settings and irradiation of visible light. A series of substrates, including both cyclic and linear hemiacetal derivatives, were effectively transformed to the borylation product in moderate to good yields. Fin ...
DOI:
10.1016/j.tet.2020.131867

8. Mechanisms of photochemical release of dissolved organic matter and iron from resuspended sediments

Author:
Hu, Bin; Wang, Peifang; Bao, Tianli; Qian, Jin; Wang, Xun
Source:
Journal of environmental sciences (China) 2021 v.104 pp. 288-295
ISSN:
1001-0742
Subject:
irradiation,   etc   ; dissolved organic matter; iron; lakes; China;     Show all 5 Subjects
Abstract:
... Photochemical reactions can alter the transformation of sedimentary organic matter into dissolved organic matter (DOM) and affect its ultimate fate in water ecosystems. In the present study, the photorelease of DOM and Fe from resuspended lake sediments was investigated under different O₂ and NO₃⁻ concentration conditions to study the mechanisms of DOM and Fe photorelease. The amount of photorelea ...
DOI:
10.1016/j.jes.2020.12.002

9. An electron beam technology of surface disinfection of the packed egg

Author:
Sokovnin, Sergey
Source:
Food and bioproducts processing 2021 v.127 pp. 276-281
ISSN:
0960-3085
Subject:
irradiation,   etc   ; biobased products; disinfection; economic analysis; eggs;     Show all 5 Subjects
Abstract:
... Food poisoning related to sanitary problems is among the most widespread illnesses in the world. An alternative way to reduce the microbiological contamination of foods is to use radiation sterilization. The basic details of the technology of surface disinfection of the packed egg (SDPE) for storage are presented. Irradiation experiments were carried out by the means of the URT-0.5 accelerator. It ...
DOI:
10.1016/j.fbp.2021.03.009

10. Effect of an organoclay on the photochemical transformations of a PBAT/PLA blend and morpho-chemical features of crosslinked networks

Author:
Scaffaro, Roberto; Maio, Andrea; Gammino, Michele; La Mantia, Francesco Paolo
Source:
Polymer degradation and stability 2021 v.187 pp. 109549
ISSN:
0141-3910
Subject:
irradiation,   etc   ; crosslinking; degradation; nanocomposites; photochemistry; spectroscopy;     Show all 6 Subjects
Abstract:
... In this work, we report the effect of an organoclay on the photochemical weathering of nanocomposites based on a poly(butylene adipate-co-terephthalate) (PBAT)/poly(lactic acid) (PLA) blend. The evolution of physicochemical properties was monitored by integrating spectroscopic, mechanical, and morphological analyses. A robust relationship was found between the molecular transformations of the poly ...
DOI:
10.1016/j.polymdegradstab.2021.109549

11. Enhanced photocatalytic degradation of glyphosate over 2D CoS/BiOBr heterojunctions under visible light irradiation

Author:
Tang, Qiang-Yong; Yang, Man-Jie; Yang, Si-Yuan; Xu, Yue-Hua
Source:
Journal of hazardous materials 2021 v.407 pp. 124798
ISSN:
0304-3894
Subject:
irradiation,   etc   ; absorption; glyphosate; light; nanosheets; photocatalysis; photocatalysts;     Show all 7 Subjects
Abstract:
... Two-dimensional (2D) heterojunction photocatalysts can shorten the carrier transfer pathway. In this study, CoS nanoparticles were deposited on the surface of 2D BiOBr nanosheets to fabricate novel ultrathin and intimate-contact 2D heterojunction photocatalysts by a two-step solvothermal route. Under visible-light (λ > 400 nm) irradiation, the apparent reaction rate constant of glyphosate degradat ...
DOI:
10.1016/j.jhazmat.2020.124798

12. Photo-responsive host–guest complexation directs dynamic covalent condensation of phenyl boronic acid and d-fructose

Author:
Klepel, Florian; Ravoo, Bart Jan
Source:
Chemical communications 2021 v.57 no.26 pp. 3207-3210
ISSN:
1364-548X
Subject:
irradiation,   etc   ; boronic acids; chemical bonding; cyclodextrins; fructose;     Show all 5 Subjects
Abstract:
... Inspired by the way templates have been used to drive dynamic combinatorial libraries by molecular recognition, we exploited the photo-responsive host-guest interaction of an azo-based photoswitch with permethylated cyclodextrin to reversibly manipulate the dynamic covalent interaction of a phenyl boronic acid and d-fructose by irradiation with light. ...
DOI:
10.1039/d1cc00090j

13. Molybdenum disulfide (MoS2) nanosheets-based hydrogels with light-triggered self-healing property for flexible sensors

Author:
Xu, Wenya; Wang, Wen; Chen, Simou; Zhang, Rui; Wang, Yuxin; Zhang, Qi; Yuwen, Lihui; Yang, Wen Jing; Wang, Lianhui
Source:
Journal of colloid and interface science 2021 v.586 pp. 601-612
ISSN:
0021-9797
Subject:
irradiation,   etc   ; electronics; hydrogels; molybdenum disulfide; nanosheets;     Show all 5 Subjects
Abstract:
... The fabrication of flexible electronic sensors with self-healing capability is of great importance for the applications in wearable devices and skin-like electronics. Herein, a molybdenum disulfide (MoS₂) nanosheets-based hydrogel (Gel-PEG-MoS₂, GPM hydrogel), with near infrared (NIR) light-induced self-healing property, was first reported as a flexible sensor. Only a small amount of MoS₂ nanoshee ...
DOI:
10.1016/j.jcis.2020.10.128

14. Judd–Ofelt parameters and X-ray irradiation results of MNb₂O₆:Eu³⁺ (M = Sr, Cd, Ni) phosphors synthesized via a molten salt method

Author:
İlhan, Mustafa; Ekmekçi, Mete Kaan; Keskin, İlker Çetin
Source:
RSC advances 2021 v.11 no.18 pp. 10451-10462
ISSN:
2046-2069
Subject:
irradiation,   etc   ; X-radiation; ceramics; photoluminescence; temperature;     Show all 5 Subjects
Abstract:
... Trivalent Eu-activated MNb₂O₆ (M = Sr, Cd, Ni) ceramic phosphors were produced using the molten salt route, which involves a low sintering temperature and provides improved homogeneity. The photoluminescence (PL) and radioluminescence (RL) spectra of phosphors exhibited characteristic Eu³⁺ emissions with ⁵F₀ → ⁷Fⱼ transitions, and strong peaks occurred at the ⁵D₀ → ⁷F₂ transition. The PL and RL em ...
DOI:
10.1039/d0ra10834k

15. Bimetallic zeolite-imidazole framework-based heterostructure with enhanced photocatalytic hydrogen production activity

Author:
Arif, Nayab; Lin, Ye-Zhan; Wang, Kai; Dou, Yi-Chuan; Zhang, Yu; Li, Kui; Liu, Shiquan; Liu, Fu-Tian
Source:
RSC advances 2021 v.11 no.16 pp. 9048-9056
ISSN:
2046-2069
Subject:
irradiation,   etc   ; catalysts; hydrogen production; oxidation; photocatalysis;     Show all 5 Subjects
Abstract:
... Bimetallic zeolite-imidazole frameworks with controllable flat band position, band gap and hydrogen evolution reaction characteristics were adopted as a photocatalytic hydrogen production catalyst. Furthermore, the g-C₃N₄–MoS₂ 2D–2D surface heterostructure was introduced to the ZnM-ZIF to facilitate the separation as well as utilization efficiency of the photo-exited charge carriers in the ZnM-ZIF ...
DOI:
10.1039/d1ra00781e

16. Visible-light-promoted E-selective synthesis of α-fluoro-β-arylalkenyl sulfides via the deoxygenation/isomerization process

Author:
Li, Yuxiu; Li, Xiangqian; Li, Xiaowei; Shi, Dayong
Source:
Chemical communications 2021 v.57 no.17 pp. 2152-2155
ISSN:
1364-548X
Subject:
irradiation,   etc   ; green light; isomerization; regioselectivity; sodium; thiols;     Show all 6 Subjects
Abstract:
... Regioselective synthesis of α-fluoro-β-arylalkenyl sulfides has been established with gem-difluoroalkenes and sodium sulfinates in a transition-metal-free manner. A series of control experiments were executed to demonstrate thiol radicals and anions as the proposed intermediates. Notably, regioselective Z → E isomerization was achieved under green light irradiation in the absence of a photoinitiat ...
DOI:
10.1039/d0cc08254f

17. Unsymmetrical dirhodium single molecule photocatalysts for H₂ production with low energy light

Author:
Millet, Agustin; Xue, Congcong; Turro, Claudia; Dunbar, Kim R.
Source:
Chemical communications 2021 v.57 no.16 pp. 2061-2064
ISSN:
1364-548X
Subject:
irradiation,   etc   ; absorption; energy; photocatalysts; red light;     Show all 5 Subjects
Abstract:
... New axially blocked unsymmetrical dirhodium complexes photocatalyze the production of H₂ under red light irradiation with a turnover number (TON) of 23 ± 3 in the presence of acid and a sacrificial donor. The presence of multiple metal/ligand-to-ligand charge transfer transitions improves their absorption of light into the near-IR. ...
DOI:
10.1039/d0cc08248a

18. Investigation of the dissolution and diffusion properties of interstitial oxygen at grain boundaries in body-centered-cubic iron by the first-principles study

Author:
Liu, Zhijie; Zhang, Yange; Li, Xiangyan; Xu, Yichun; Wu, Xuebang; Liu, Changsong; Kong, Xiangshan; Yao, Cunfeng; Wang, Zhiguang
Source:
RSC advances 2021 v.11 no.15 pp. 8643-8653
ISSN:
2046-2069
Subject:
irradiation,   etc   ; corrosion; energy; iron; oxidation; oxygen; steel;     Show all 7 Subjects
Abstract:
... Oxidation corrosion of steel is a universal problem in various industries and severely accelerated in nuclear reactors. First-principles calculations are performed to explore the dissolution and diffusion properties of interstitial oxygen in the body-centered-cubic iron grain boundaries Σ3〈110〉(111) and Σ5〈001〉(310). Solution energies indicate that interstitial oxygen atoms prefer to dissolve in b ...
DOI:
10.1039/d1ra00367d

19. Selective release of a potent anticancer agent from a supramolecular hydrogel using green light

Author:
Karcher, Johannes; Kirchner, Susanne; Leistner, Anna-Lena; Hald, Christian; Geng, Philipp; Bantle, Tobias; Gödtel, Peter; Pfeifer, Juliana; Pianowski, Zbigniew L.
Source:
RSC advances 2021 v.11 no.15 pp. 8546-8551
ISSN:
2046-2069
Subject:
irradiation,   etc   ; antineoplastic agents; green light; hydrogels;     Show all 4 Subjects
Abstract:
... Light-triggered drug release from hydrogels is a promising method to improve efficiency of antitumor treatment, as an alternative to existing photodynamic therapies. Here we report a photochromic supramolecular low-MW hydrogel that can quickly and selectively release a physically encapsulated potent anticancer agent upon green light irradiation under physiological conditions. ...
DOI:
10.1039/d0ra08893e

20. A facile synthesis of Zn-doped TiO₂ nanoparticles with highly exposed (001) facets for enhanced photocatalytic performance

Author:
Jiang, Kun; Zhang, Jin; Luo, Rui; Wan, Yingfei; Liu, Zengjian; Chen, Jinwei
Source:
RSC advances 2021 v.11 no.13 pp. 7627-7632
ISSN:
2046-2069
Subject:
irradiation,   etc   ; absorption; light; photocatalysis; photocatalysts; rhodamines; wavelengths;     Show all 7 Subjects
Abstract:
... It is a great challenge to simultaneously improve the visible light absorption capacity and enhance photon-generated carrier separation efficiency of photocatalysts. Herein, Zn-doped TiO₂ nanoparticles with high exposure of the (001) crystal face were prepared via a one-step hydrothermal decomposition method. A detailed analysis reveals that the electronic structures were modulated by Zn doping; t ...
DOI:
10.1039/d0ra09318a