meso-Carbazole substituted palladium porphyrins: Efficient catalysts for visible light induced oxidation of aldehydes

2021 ◽  
pp. A-K
Author(s):  
Anu Janaagal ◽  
Vijayalakshmi Pandey ◽  
Sudhir Sabharwal ◽  
Iti Gupta
Keyword(s):  
Visible Light ◽  
Singlet Oxygen ◽  
Aerobic Oxidation ◽  
Aromatic Aldehydes ◽  
Palladium Complexes ◽  
Light Irradiation ◽  
Quantum Yields ◽  
Oxidation Reactions ◽  
Photo Oxidation ◽  
Catalytic Application

The A3B and A2B2 type porphyrins having [Formula: see text]-butylcarbazole and [Formula: see text]-cyanophenyl groups are synthesized and characterized. Their palladium complexes have also been prepared and utilized as catalysts for the photo-oxidation reactions of aromatic aldehydes in good yields. Pd(II)porphyrins displayed decent phosphorescence at [Formula: see text]670 nm and were able to generate singlet oxygen upon light irradiation. The calculated singlet oxygen quantum yields for Pd(II)porphyrins were between 57% and 73%. The photo-catalytic application of Pd(II)porphyrins for aerobic oxidation of aromatic aldehydes is demonstrated.

Robust porous organic polymers as efficient heterogeneous organo-photocatalysts for aerobic oxidation reactions

2017 ◽  
Vol 5 (18) ◽  
pp. 8697-8704 ◽  
Author(s):  
Yongfeng Zhi ◽  
Kun Li ◽  
Hong Xia ◽  
Ming Xue ◽  
Ying Mu ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Aerobic Oxidation ◽  
Light Irradiation ◽  
Organic Polymer ◽  
Oxidation Reactions ◽  
Porous Organic Polymers ◽  
Heterogeneous Catalytic ◽  
Wide Range ◽  
Catalytic Performances

A novel nanoporous organic polymer (CF-HCP), which exhibits excellent heterogeneous catalytic performances for a wide range of organic reactions under visible-light irradiation, is reported.

Spatial separation of dual-cocatalysts on bismuth vanadate for selective aerobic oxidation of benzylalcohols to benzaldehydes under visible light irradiation

2018 ◽  
Vol 8 (23) ◽  
pp. 6173-6179 ◽  
Author(s):  
Xu Jin ◽  
Rengui Li ◽  
Yue Zhao ◽  
Xiaodan Liu ◽  
Xiaoqi Wang ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Aerobic Oxidation ◽  
Spatial Separation ◽  
Bismuth Vanadate ◽  
Light Irradiation ◽  
Selective Aerobic Oxidation

Efficient converting of alcohols to aldehydes under visible light can be achieved on BiVO4 crystals with spatial separation of dual-cocatalysts.

scholarly journals Ruthenium-based PACT agents based on bisquinoline chelates: synthesis, photochemistry, and cytotoxicity

2021 ◽  
Author(s):  
Anja Busemann ◽  
Ingrid Flaspohler ◽  
Xue-Quan Zhou ◽  
Claudia Schmidt ◽  
Sina K. Goetzfried ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Singlet Oxygen ◽  
Cancer Cells ◽  
Cellular Uptake ◽  
Ruthenium Complex ◽  
Human Cancer ◽  
Light Irradiation ◽  
Quantum Yields ◽  
Light Activation ◽  
Human Cancer Cells

AbstractThe known ruthenium complex [Ru(tpy)(bpy)(Hmte)](PF6)2 ([1](PF6)2, where tpy = 2,2’:6’,2″-terpyridine, bpy = 2,2’-bipyridine, Hmte = 2-(methylthio)ethanol) is photosubstitutionally active but non-toxic to cancer cells even upon light irradiation. In this work, the two analogs complexes [Ru(tpy)(NN)(Hmte)](PF6)2, where NN = 3,3'-biisoquinoline (i-biq, [2](PF6)2) and di(isoquinolin-3-yl)amine (i-Hdiqa, [3](PF6)2), were synthesized and their photochemistry and phototoxicity evaluated to assess their suitability as photoactivated chemotherapy (PACT) agents. The increase of the aromatic surface of [2](PF6)2 and [3](PF6)2, compared to [1](PF6)2, leads to higher lipophilicity and higher cellular uptake for the former complexes. Such improved uptake is directly correlated to the cytotoxicity of these compounds in the dark: while [2](PF6)2 and [3](PF6)2 showed low EC50 values in human cancer cells, [1](PF6)2 is not cytotoxic due to poor cellular uptake. While stable in the dark, all complexes substituted the protecting thioether ligand upon light irradiation (520 nm), with the highest photosubstitution quantum yield found for [3](PF6)2 (Φ[3] = 0.070). Compounds [2](PF6)2 and [3](PF6)2 were found both more cytotoxic after light activation than in the dark, with a photo index of 4. Considering the very low singlet oxygen quantum yields of these compounds, and the lack of cytotoxicity of the photoreleased Hmte thioether ligand, it can be concluded that the toxicity observed after light activation is due to the photoreleased aqua complexes [Ru(tpy)(NN)(OH2)]2+, and thus that [2](PF6)2 and [3](PF6)2 are promising PACT candidates. Graphic abstract

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.

scholarly journals Benzothiadiazole Conjugated Metalorganic Framework for Organic Aerobic Oxidation Reactions under Visible Light

2017 ◽  
Vol 75 (1) ◽  
pp. 80 ◽  
Author(s):  
Wen-Qiang Zhang ◽  
Qiu-Yan Li ◽  
Xinyu Yang ◽  
Zheng Ma ◽  
Huanhuan Wang ◽  
...  
Keyword(s):  
Visible Light ◽  
Aerobic Oxidation ◽  
Oxidation Reactions ◽  
Metalorganic Framework

Photosensitized oxidation of 9,10-dimethylanthracene with singlet oxygen by using a safranin O/silica composite under visible light

2015 ◽  
Vol 14 (3) ◽  
pp. 597-602 ◽  
Author(s):  
Elim Albiter ◽  
Salvador Alfaro ◽  
Miguel A. Valenzuela
Keyword(s):  
Visible Light ◽  
Singlet Oxygen ◽  
Second Step ◽  
Homogeneous Reaction ◽  
Photosensitized Oxidation ◽  
Photo Oxidation ◽  
The Third ◽  
Silica Composite ◽  
Safranin O

The photo-oxidation of DMA could be carried out in 3 steps: the first step is the photosensitized production of 1O2 near the surface of the composite; the second step is the diffusion of 1O2 from the surroundings of the surface to the solvent and the third step is the homogeneous reaction between 1O2 and DMA.

scholarly journals Tertiary amine mediated aerobic oxidation of sulfides into sulfoxides by visible-light photoredox catalysis on TiO2

2015 ◽  
Vol 6 (8) ◽  
pp. 5000-5005 ◽  
Author(s):  
Xianjun Lang ◽  
Wei Hao ◽  
Wan Ru Leow ◽  
Shuzhou Li ◽  
Jincai Zhao ◽  
...  
Keyword(s):  
Visible Light ◽  
Tertiary Amine ◽  
Visible Light Irradiation ◽  
Aerobic Oxidation ◽  
Light Irradiation ◽  
Photoredox Catalysis ◽  
Synergistic Catalysis ◽  
Oxidation Of Sulfides ◽  
Selective Aerobic Oxidation

The selective aerobic oxidation of sulfides into sulfoxides on TiO2 under visible-light irradiation was accomplished through synergistic catalysis with triethylamine.

Sign in / Sign up

Export Citation Format

Share Document