Sulphonic acid functionalized porphyrin anchored with a meso-substituted triazolium ionic liquid moiety: a heterogeneous photo-catalyst for metal/base free C–C cross-coupling and C–N/C–H activation using aryl chloride under visible light irradiation

2020 ◽  
Vol 44 (45) ◽  
pp. 19690-19712
Author(s):  
Karan Bhansali ◽  
Subodh Raut ◽  
Shital Barange ◽  
Pundlik Bhagat
Keyword(s):  
Ionic Liquid ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Cross Coupling ◽  
Sulphonic Acid ◽  
Light Irradiation ◽  
Aryl Chloride ◽  
Metal Base ◽  
Photo Catalyst

We report an easy process to synthesize sulphonic acid functionalized porphyrin with meso-substituted triazolium ionic liquid moiety for metal/base free C–C cross-coupling and C–N/C–H activation using aryl chloride under visible light irradiation.

Photo-Catalytic Activity of Carbon/Nitrogen Doped TiO2-SiO2 under UV and Visible Light Irradiation

2012 ◽  
Vol 734 ◽  
pp. 226-236 ◽  
Author(s):  
Henry H. Mungondori ◽  
Lilian Tichagwa
Keyword(s):  
Titanium Dioxide ◽  
Visible Light ◽  
Silicon Dioxide ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Phenol Red ◽  
Carbon And Nitrogen ◽  
Photo Catalyst ◽  
Nitrogen Doped ◽  
Glass Support

The sol gel synthesis method was used to prepare carbon and nitrogen doped titanium dioxide (TiO2) photo-catalyst using titanium tetrachloride (TiCl4) as the precursor. Doping was carried out to modify the absorption band edge of titanium dioxide. To avert the problem associated with use of powder TiO2, the photo-catalyst was immobilized on glass support using tetraethyl orthosilicate (TEOS), which served as a binder and precursor for silicon dioxide (SiO2). The prepared photo-catalytic materials were characterized by FT-IR, XRD, TEM, BET and DRS. The photo-catalytic efficiency of titanium dioxide immobilized on glass support was evaluated using the degradation of methyl orange (MeO) and phenol red (PRed) under ultraviolet and visible light irradiation. Doping with carbon and nitrogen, and incorporation of silicon dioxide into the titanium dioxide matrix allowed utilization of visible light by the prepared TiO2-SiO2nanocomposites. Photo-degradation tests were carried out for doped and undoped photo-catalyst. An increased rate of photo-oxidation of methyl orange and phenol red was observed under visible light irradiation as compared to UV light irradiation.

scholarly journals Organocatalyzed Photoelectrochemical C−H Amination of Arenes

2021 ◽  
Author(s):  
Zhong-Wei Hou ◽  
Hong Yan ◽  
Jinshuai Song ◽  
Hai-Chao Xu
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Cross Coupling ◽  
Light Irradiation ◽  
Molecular Catalyst ◽  
Halogenated Benzenes ◽  
Undivided Cell ◽  
Chemical Oxidants ◽  
Photoelectrochemical Method

Catalytic C–H/N–H cross-coupling is considered an ideal strategy for accessing anilines and derivatives, but its synthetic execution remains extremely challenging, especially when the exclusion of external oxidants is desired. Report herein is a photoelectrochemical method for the preparation of anilides through C–H/N–H coupling of arenes and carbamates, which employs DDQ as a molecular catalyst. The reactions are conducted in a simple undivided cell with visible-light irradiation and without any need for external chemical oxidants. In addition, the reactions employ arenes as the limiting agent, and are compatible with benzene and halogenated benzenes

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