scholarly journals Boron carbonitride photocatalysts for direct decarboxylation: the construction of C(sp3)-N or C(sp3)-C(sp2) bonds with visible light

2021 ◽  
Author(s):  
Jiale Shi ◽  
Tao Yuan ◽  
Rong Wang ◽  
Meifang Zheng ◽  
Xinchen Wang
Keyword(s):  
Visible Light ◽  
Ambient Conditions ◽  
Boron Carbonitride ◽  
Metal Free ◽  
Carbon Nitrides ◽  
Boron Carbon

A metal-free protocol for decarboxylative N-H or C(sp2)-H functionalization of acids was established via metal-free boron carbon nitrides (BCN) photocatalysis, delivering the desired products under ambient conditions. This methodology is...

Nanoscale boron carbonitride semiconductors for photoredox catalysis

Nanoscale ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 3593-3604 ◽  
Author(s):  
Meifang Zheng ◽  
Wancang Cai ◽  
Yuanxing Fang ◽  
Xinchen Wang
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Low Cost ◽  
Solar Energy Conversion ◽  
Photoredox Catalysis ◽  
Boron Carbonitride ◽  
Metal Free ◽  
Carbon Nitrides ◽  
Boron Carbon

Ceramic boron carbon nitrides are utilized as semiconductor for solar energy conversion. The photocatalyst provides a low-cost, robust, metal-free, and ambient method for sustainable photosynthesis.

Light-induced synthesis of unsymmetrical organic carbonates from alcohols, methanol, and CO2 under ambient conditions

2021 ◽  
Author(s):  
Sandhya Saini ◽  
Nand Kishor Gour ◽  
Shafiur Rehman Khan ◽  
Ramesh Deka ◽  
Suman L. Jain
Keyword(s):  
Visible Light ◽  
Organic Base ◽  
Ambient Conditions ◽  
Metal Free ◽  
Organic Carbonates

The present work describes the first visible light-assisted, metal-free and organic base 1,1,3,3-tetramethyl guanidine (TMG) mediated synthesis of unsymmetrical methyl aryl/ alkyl carbonates from the reaction of alcohols, methanol and...

Visible Light-Promoted Thiocyanation of sp2 C-H bonds over Heterogeneous Graphitic Carbon Nitrides

2021 ◽  
Author(s):  
Wei Chen ◽  
Tingzhen Li ◽  
Xinwen Peng
Keyword(s):  
Visible Light ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Metal Free ◽  
Carbon Nitrides

Mesoporous graphitic carbon nitride (mpg-C3N4) has been developed as a metal-free heterogeneous photocatalyst for the thiocyanation transformations. The reaction proceeded efficiently by utilizing air as the green oxidant under mild...

Metal-free, visible-light-promoted oxidative radical cyclization of N-biarylglycine esters: one-pot construction of phenanthridine-6-carboxylates in water

2019 ◽  
Vol 21 (16) ◽  
pp. 4406-4411 ◽  
Author(s):  
Palani Natarajan ◽  
Deachen Chuskit ◽  
Priya Priya
Keyword(s):  
Visible Light ◽  
Intramolecular Cyclization ◽  
Radical Cyclization ◽  
Cyclization Reaction ◽  
Ambient Conditions ◽  
One Pot ◽  
Light Blue ◽  
Metal Free ◽  
Air Atmosphere ◽  
Oxidative Radical Cyclization

A metal-free, visible-light (blue LED: hν = 425 ± 15 nm) photoredox-catalyzed intramolecular cyclization reaction of N-biarylglycine esters to phenanthridine-6-carboxylates in water under an open air atmosphere at ambient conditions has been developed.

Bio-templated fabrication of metal-free boron carbonitride tubes for visible light photocatalysis

2017 ◽  
Vol 53 (88) ◽  
pp. 11988-11991 ◽  
Author(s):  
Liuyong Chen ◽  
Xinchen Wang
Keyword(s):  
Visible Light ◽  
Carbon Nitride ◽  
Low Cost ◽  
Light Illumination ◽  
Visible Light Photocatalysis ◽  
Boron Carbonitride ◽  
Visible Light Illumination ◽  
Kapok Fibers ◽  
Boron Carbon Nitride ◽  
Boron Carbon

A novel and facile biotemplating method has been presented to synthesize boron carbon nitride tubes (BCNTs) by using the low-cost kapok fibers (KFs). This pathway not only transplanted the structure of KFs into the h-BN lattice, but also introduced C simultaneously in a self-doping manner. The BCNT photocatalysts can catalyse hydrogen evolution from water under visible light illumination.

1,2,4-Triazole-Based Approach to Noble-Metal-Free Visible-Light Driven Water Splitting over Carbon Nitrides

2016 ◽  
Vol 28 (3) ◽  
pp. 772-778 ◽  
Author(s):  
Dariya Dontsova ◽  
Christian Fettkenhauer ◽  
Vasiliki Papaefthimiou ◽  
Johannes Schmidt ◽  
Markus Antonietti
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Noble Metal ◽  
Metal Free ◽  
Carbon Nitrides ◽  
Visible Light Driven

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.

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