Structural Design Principle of Small-Molecule Organic Semiconductors for Metal-Free, Visible-Light-Promoted Photocatalysis

2016 ◽  
Vol 55 (33) ◽  
pp. 9783-9787 ◽  
Author(s):  
Lei Wang ◽  
Wei Huang ◽  
Run Li ◽  
Dominik Gehrig ◽  
Paul W. M. Blom ◽  
...  
Keyword(s):  
Visible Light ◽  
Organic Semiconductors ◽  
Small Molecule ◽  
Structural Design ◽  
Design Principle ◽  
Metal Free

scholarly journals Noble metal-free hydrogen-evolving photocathodes based on small molecule organic semiconductors

2016 ◽  
Vol 27 (35) ◽  
pp. 355401 ◽  
Author(s):  
A Morozan ◽  
T Bourgeteau ◽  
D Tondelier ◽  
B Geffroy ◽  
B Jousselme ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Noble Metal ◽  
Small Molecule ◽  
Metal Free ◽  
Free Hydrogen

scholarly journals Biscoumarin-containing acenes as stable organic semiconductors for photocatalytic oxygen reduction to hydrogen peroxide

2017 ◽  
Vol 5 (39) ◽  
pp. 20780-20788 ◽  
Author(s):  
Marek K. Węcławski ◽  
Marie Jakešová ◽  
Martyna Charyton ◽  
Nicola Demitri ◽  
Beata Koszarna ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Visible Light ◽  
Oxygen Reduction ◽  
Organic Semiconductors ◽  
Small Molecule ◽  
Light Illumination ◽  
Visible Light Illumination

Organic small-molecule semiconductors can be photocatalysts in their own right, oxidizing water while reducing oxygen to hydrogen peroxide under visible light illumination.

Metal-Free Redox Transformations for C–C and C–N Bond Construction

Synlett ◽  
2017 ◽  
Vol 28 (20) ◽  
pp. 2707-2713 ◽  
Author(s):  
Saad Shaaban ◽  
Nuno Maulide
Keyword(s):  
Visible Light ◽  
Small Molecule ◽  
Diazonium Salts ◽  
Photoredox Catalysis ◽  
Redox Transformations ◽  
Metal Free ◽  
The Way

In this Account, the authors retrace their development of remote functionalisation reactions relying on photoredox catalysis. Inextricably connected to this is their discovery of small molecule organocatalysts that behave as formal reductive activators of diazonium salts, while requiring no promotion by visible light. This ultimately paved the way for the development of an unusual class of reactions in which the catalyst is also the nucleophile.

Regioselective C3-H Trifluoromethylation of 2H-Indazole Under Transition-Metal-Free Photoredox Catalysis

2019 ◽  
Author(s):  
Arumugavel Murugan ◽  
Venkata Nagarjuna Babu ◽  
Nagaraj Sabarinathan ◽  
Sharada Duddu. S
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Practical Approach ◽  
Hypervalent Iodine ◽  
Radical Mechanism ◽  
Photoredox Catalysis ◽  
Metal Free

Here we report a visible-light-promoted metal-free regioselective C3-H trifluoromehtylation reaction that proceeds via radical mechanism and which supported by control experiments. The combination of photoredox catalysis and hypervalent iodine reagent provides a practical approach for the present trifluoromethylation reaction and synthesis of a library of trifluoromethylated indazoles.

Metal‐Free and Heterogeneous Photocatalytic Reduction of 4‐Nitroaniline by a Poly(Ethylene Glycol)‐Supported Eosin Dye under Visible‐Light Exposure

ChemCatChem ◽  
2019 ◽  
Vol 11 (14) ◽  
pp. 3307-3317
Author(s):  
Andreea L. Chibac ◽  
Violeta Melinte ◽  
Vlasta Brezová ◽  
Estelle Renard ◽  
Arnaud Brosseau ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Visible Light ◽  
Light Exposure ◽  
Photocatalytic Reduction ◽  
Poly Ethylene Glycol ◽  
Metal Free ◽  
Poly Ethylene

Highly chemoselective deoxygenation of N-heterocyclic N-oxides under transition metal-free conditions

2021 ◽  
Vol 19 (16) ◽  
pp. 3735-3742
Author(s):  
Se Hyun Kim ◽  
Ju Hyeon An ◽  
Jun Hee Lee
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Eosin Y ◽  
Metal Free ◽  
Simple Protocol

Here, we provide an operationally simple protocol for the highly chemoselective deoxygenation of various functionalized N-heterocyclic N-oxides under visible light-mediated photoredox conditions with Na2-eosin Y as an organophotocatalyst.

Metal-free visible-light-induced aerobic oxidation of α-diazoesters leading to α-ketoesters in air

2021 ◽  
Author(s):  
Ruisheng Liu ◽  
Qishun Liu ◽  
Haoran Meng ◽  
Hongyu Ding ◽  
Jindong Hao ◽  
...  
Keyword(s):  
Visible Light ◽  
Room Temperature ◽  
Aerobic Oxidation ◽  
Metal Free

A metal-free and visible-light-induced strategy has been established for the construction of α-ketoesters via aerobic oxidation of α-diazoesters with dioxygen in air at room temperature.

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