scholarly journals A visible-light-induced, metal-free bis-arylation of 2,5-dichlorobenzoquinone

2021 ◽  
Vol 17 ◽  
pp. 2315-2320
Author(s):  
Pieterjan Winant ◽  
Wim Dehaen
Keyword(s):  
Visible Light ◽  
Reaction Products ◽  
Green Method ◽  
Light Reaction ◽  
Metal Free

A metal-free protocol for the direct bis-arylation of 2,5-dichlorobenzoquinone with aryldiazonium salts is reported. The reactive salts are generated in situ and converted to radicals through irradiation with visible light. Reaction products precipitate from the solvent, eliminating the need for purification and thus providing a novel green method for the synthesis of versatile bis-electrophiles.

A noble-metal-free MoS2 nanosheet-coupled MAPbI3 photocatalyst for efficient and stable visible-light-driven hydrogen evolution

2020 ◽  
Vol 56 (22) ◽  
pp. 3281-3284 ◽  
Author(s):  
Fang Wang ◽  
Xiangyu Liu ◽  
Zhengguo Zhang ◽  
Shixiong Min
Keyword(s):  
Visible Light ◽  
Hydrogen Evolution ◽  
Noble Metal ◽  
Composite Photocatalyst ◽  
Metal Free ◽  
Visible Light Driven ◽  
Mos2 Nanosheet

MoS2 nanosheets (MoS2 NSs) as a cocatalyst in situ coupled with MAPbI3 lead to a superior composite photocatalyst for visible light H2 evolution from HI splitting.

In situ photodeposition of amorphous NixP on CdS nanorods for efficient visible-light photocatalytic H2 generation

2019 ◽  
Vol 9 (19) ◽  
pp. 5394-5400 ◽  
Author(s):  
Simeng Zhu ◽  
Jing Wang ◽  
Yishan He ◽  
Zhiyang Yu ◽  
Xuxu Wang ◽  
...  
Keyword(s):  
Visible Light ◽  
Noble Metal ◽  
Metal Free ◽  
H2 Generation ◽  
Cds Nanorods ◽  
Photocatalytic H2 Generation ◽  
Visible Light Photocatalytic

Noble metal-free amorphous NixP modified CdS with superior photocatalytic H2 evolution activity has been successfully fabricated.

In situ photo deposition fabrication of NiCo/g-C3N4 photocatalyst for efficient catalytic hydrogen generation

2021 ◽  
Author(s):  
Jinghua Li ◽  
Bing Luo ◽  
Xuewen Zheng ◽  
Dengwei Jing ◽  
Lijing Ma
Keyword(s):  
Visible Light ◽  
Noble Metal ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Hydrogen Generation ◽  
Light Irradiation ◽  
Metal Free ◽  
Catalytic Hydrogen

In this work, we have prepared noble metal free NiCo/g-C3N4 photocatalysts by situ photoreduction method. The Ni23Co1/g-C3N4 photocatalyst showed excellent photocatalytic performance under visible light irradiation with a high H2...

scholarly journals Visible Light Promoted Metal Free Sustainable Reduction of Activated Carbon-Carbon Double Bonds Without Any External Reductant

2021 ◽  
Author(s):  
Anindita Bhowmick ◽  
Prakash K. Warghude ◽  
Dr. Ramakrishna G. Bhat
Keyword(s):  
Double Bond ◽  
Visible Light ◽  
Eosin Y ◽  
Mechanistic Studies ◽  
Double Bonds ◽  
Efficient Catalyst ◽  
Metal Free ◽  
Effective Reduction ◽  
Synthetic Application

Visible light promoted chemo-selective metal free hydrogenation of activated double bond has been achieved via photoredox catalysis. Eosin Y has proved to an efficient catalyst for the effective reduction of C-C double bonds of isatins, oxindoles and maleimides under visible light. The method worked efficiently without the aid of any external reductants. Commercially viable DIPEA has been employed as a sacrificial electron donor and it’s in-situ generated cationic radical acts as reductant in this transformation. The method proved to be practical as a broad range of substrates containing activated double bond were easily reduced. The method proved to be scalable on a gram scale and the reduced product has been utilized successfully for the further synthetic application. The systematic and detailed mechanistic studies reveal the reductive quenching of the photocatalyst by the activated double bond.

Transition-metal-free visible-light photoredox catalysis at room-temperature for decarboxylative fluorination of aliphatic carboxylic acids by organic dyes

2015 ◽  
Vol 51 (59) ◽  
pp. 11864-11867 ◽  
Author(s):  
Xinxin Wu ◽  
Chunna Meng ◽  
Xiaoqian Yuan ◽  
Xiaotong Jia ◽  
Xuhong Qian ◽  
...  
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Carboxylic Acids ◽  
Room Temperature ◽  
Organic Dyes ◽  
Photoredox Catalysis ◽  
Green Method ◽  
Metal Free ◽  
Aliphatic Carboxylic Acids

We report herein an efficient, general and green method for decarboxylative fluorination of aliphatic carboxylicacids.

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
Sign in / Sign up

Export Citation Format

Share Document