Potent oxidation of DNA by Ru(ii) tri(polypyridyl) complexes under visible light irradiation via a singlet oxygen-mediated mechanism

2021 ◽  
Author(s):  
Jie Shao ◽  
Zhu-Ying Yan ◽  
Miao Tang ◽  
Chun-Hua Huang ◽  
Zhi-Guo Sheng ◽  
...  
Keyword(s):  
Visible Light ◽  
Singlet Oxygen ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Type Ii ◽  
Polypyridyl Complexes ◽  
Oxidation Of Dna

The irradiation of Ru(ii) tri(polypridyl) complexes with visible light can induce potent oxidation of DNA mediated by 1O2via a type II photosensitization mechanism.

scholarly journals Singlet oxygen generation properties of an inclusion complex of cyclic free-base porphyrin dimer and fullerene C60

RSC Advances ◽  
2017 ◽  
Vol 7 (30) ◽  
pp. 18690-18695 ◽  
Author(s):  
Yousuke Ooyama ◽  
Toshiaki Enoki ◽  
Joji Ohshita ◽  
Takuya Kamimura ◽  
Shuwa Ozako ◽  
...  
Keyword(s):  
Inclusion Complex ◽  
Visible Light ◽  
Singlet Oxygen ◽  
Visible Light Irradiation ◽  
Fullerene C60 ◽  
Light Irradiation ◽  
Free Base ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Porphyrin Dimer

We demonstrate that a cyclic free-base porphyrin dimer and its inclusion complex with fullerene C60 possess the ability to generate singlet oxygen (1O2) under visible light irradiation.

A new chemical approach for proximity labelling of chromatin-associated RNAs and proteins with visible light irradiation

2019 ◽  
Vol 55 (82) ◽  
pp. 12340-12343 ◽  
Author(s):  
Lan Li ◽  
Jiying Liang ◽  
Hao Luo ◽  
K. Ming Tam ◽  
Edmund C. M. Tse ◽  
...  
Keyword(s):  
Visible Light ◽  
Singlet Oxygen ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Chemical Approach ◽  
Oxygen Generator ◽  
Singlet Oxygen Generator

A new nucleus-localized singlet oxygen generator was designed and synthesized.

Synthesis of 2-hydroxymalonic acid derivatives via tandem oxidation and rearrangement by photo organic catalysis

RSC Advances ◽  
2016 ◽  
Vol 6 (48) ◽  
pp. 42596-42599 ◽  
Author(s):  
Akifumi Okada ◽  
Yoshitomo Nagasawa ◽  
Tomoaki Yamaguchi ◽  
Eiji Yamaguchi ◽  
Norihiro Tada ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Singlet Oxygen ◽  
Visible Light Irradiation ◽  
Catalytic Amount ◽  
Light Irradiation ◽  
Direct Transformation ◽  
Fluorescent Lamps ◽  
Organic Catalysis

This report describes a mild method for the direct transformation of β-oxoesters to the corresponding tartronic esters using singlet oxygen produced by a catalytic amount of methylene blue and visible light irradiation using fluorescent lamps.

Graphitic carbon nitride/CoTPP type-II heterostructures with significantly enhanced photocatalytic hydrogen evolution

2019 ◽  
Vol 9 (9) ◽  
pp. 2196-2202 ◽  
Author(s):  
Miza Kombo ◽  
Liu-Bo Ma ◽  
Ya-Nan Liu ◽  
Xiao-Xiang Fang ◽  
Naseeb Ullah ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Light Irradiation ◽  
Graphitic Carbon Nitride ◽  
Type Ii ◽  
Electron Hole ◽  
Photocatalytic Hydrogen Evolution

CoTPP inhibits the recombination of electron-hole pairs through extracting holes from g-C3N4 thus dramatically enhancing photocatalytic hydrogen production under visible light irradiation.

scholarly journals Riboflavin-photosensitized thiamine oxidation in aqueous solutions on exposure to ultraviolet and visible light

2020 ◽  
Vol 65 (2) ◽  
pp. 199-211
Author(s):  
I. I. Stepuro ◽  
S. A. Labor ◽  
V. I. Stsiapura ◽  
A. V. Yantsevich
Keyword(s):  
Aqueous Solutions ◽  
Visible Light ◽  
Triplet State ◽  
Singlet Oxygen ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Triplet States ◽  
Anaerobic Conditions ◽  
Aerobic Conditions

It was shown the irradiation of aqueous solutions of thiamine and riboflavin with ultraviolet UVA (315–400 nm) and visible light (λ > 400 nm) leads to oxidation of thiamine to thiochrome and oxodihydrothiochrome. In absence of riboflavin in aerobic conditions thiamine oxidation to thiochrome was mainly due to reaction with singlet oxygen. Under anaerobic conditions, thiamine in the presence of riboflavin was photostable and UV and visible light irradiation of their aqueous solutions did not result in thiamine oxidation. Under aerobic conditions, thiochrome was oxidized to form oxodihydrothiohrome in reactions with singlet oxygen and riboflavin in triplet states. Under anaerobic conditions, oxidation of thiochrome to oxodihydrothiochrome occurred due to reaction with riboflavin in triplet state. Possible mechanisms of the damage of cellular eye structures due to inactivation of thiamine-dependent enzymes on exposure to intensive UVA and visible light in the presence of endogenous photosensitizer riboflavin are discussed.

One-pot fabrication of 2D/2D HCa2Nb3O10/g-C3N4 type II heterojunctions towards enhanced photocatalytic H2 evolution under visible-light irradiation

2020 ◽  
Vol 10 (17) ◽  
pp. 5896-5902 ◽  
Author(s):  
Jinwen Shi ◽  
Liuhao Mao ◽  
Chongze Cai ◽  
Gaosheng Li ◽  
Cheng Cheng ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Type Ii ◽  
H2 Evolution ◽  
One Pot ◽  
Composite Photocatalysts ◽  
Photocatalytic H2 Evolution

Effective 2D-composite photocatalysts, HCa2Nb3O10/g-C3N4, with enhanced photocatalytic activity are conveniently synthesized by a facile one-pot method.

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