Visible light-induced direct conversion of aldehydes into nitriles in aqueous medium using Co@g-C3N4 as photocatalyst

2019 ◽  
Vol 119 ◽  
pp. 76-81 ◽  
Author(s):  
Fooleswar Verma ◽  
Prashant Shukla ◽  
Smita R. Bhardiya ◽  
Manorama Singh ◽  
Ankita Rai ◽  
...  
Keyword(s):  
Visible Light ◽  
Aqueous Medium ◽  
Direct Conversion

Photoassisted Production of O2-• and H2 in Aqueous Medium Stimulated by Polythiophene in ZSM-5 Zeolite Channels

1999 ◽  
Vol 64 (1) ◽  
pp. 149-156 ◽  
Author(s):  
Gabriel Čík ◽  
František Šeršeň ◽  
Alena Bumbálová
Keyword(s):  
Reactive Oxygen Species ◽  
Ion Exchange ◽  
Visible Light ◽  
Aqueous Medium ◽  
Exchange Reaction ◽  
Epr Spectroscopy ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Water Reduction ◽  
Ion Exchange Reaction

The formation of reactive oxygen species due to irradiation by a visible light of the polythiophene deposited in ZSM-5 zeolite channels in aqueous medium has been studied. Polymerization of thiophene was carried out in zeolite channels after the ion-exchange reaction of Na+ for Fe3+. By means of EPR spectroscopy, the temporarily generated 1O2 in irradiated aqueous medium was proved. The formation of O2-• was confirmed by the reduction of Fe3+-cytochrome c. Irradiation led to the water reduction to hydrogen.

Visible‐Light Direct Conversion of Ethanol to 1,1‐Diethoxyethane and Hydrogen over a Non‐Precious Metal Photocatalyst

2018 ◽  
Vol 25 (1) ◽  
pp. 189-194 ◽  
Author(s):  
Yuguang Chao ◽  
Wenqin Zhang ◽  
Xuemei Wu ◽  
Nana Gong ◽  
Zhihong Bi ◽  
...  
Keyword(s):  
Visible Light ◽  
Precious Metal ◽  
Direct Conversion

scholarly journals Light-Driven Depolymerization of Native Lignin Enabled by Proton- Coupled Electron Transfer

2019 ◽  
Author(s):  
Suong Nguyen ◽  
Phillip Murray ◽  
Robert Knowles
Keyword(s):  
Electron Transfer ◽  
Visible Light ◽  
Bond Cleavage ◽  
Direct Conversion ◽  
Alkoxy Radical ◽  
Radical Intermediate ◽  
Polymer Backbone ◽  
Good Efficiency ◽  
Chemical Reagents ◽  
Proton Coupled Electron Transfer

<div><p>Here we report a catalytic, light-driven method for the redox-neutral depolymerization of native lignin biomass at ambient temperature. This transformation proceeds via a proton-coupled electron-transfer (PCET) activation of an alcohol O–H bond to generate a key alkoxy radical intermediate, which then drives the <i>β</i>-scission of a vicinal C–C bond. Notably, this depolymerization is driven solely by visible light irradiation, requiring no stoichiometric chemical reagents and producing no stoichiometric waste. This method exhibits good efficiency and excellent selectivity for the activation and fragmentation of <i>β</i>-O-4 linkages in the polymer backbone, even in the presence of numerous other PCET-active functional groups. DFT analysis suggests that the key C–C bond cleavage reactions produce non-equilibrium product distributions, driven by excited-state redox events. These results provide further evidence that visible-light photocatalysis can serve as a viable method for the direct conversion of lignin biomass into valuable arene feedstocks.</p></div>

A novel chemosensor with visible light excitability for sensing CN− in aqueous medium and living cells via a Cu2+ displacement approach

2017 ◽  
Vol 9 (2) ◽  
pp. 259-266 ◽  
Author(s):  
Liyuan Qin ◽  
Lingjie Hou ◽  
Jia Feng ◽  
Jianbin Chao ◽  
Yu Wang ◽  
...  
Keyword(s):  
Visible Light ◽  
Aqueous Medium ◽  
Living Cells ◽  
Receptor System ◽  
System L ◽  
Displacement Approach

A new and simple julolidine based molecular receptor system L linked to 4-phenylsemicarbazide through an imine moiety has been synthesized and characterized.

Direct conversion of cellulose into ethanol catalysed by a combination of tungstic acid and zirconia-supported Pt nanoparticles

2019 ◽  
Vol 55 (30) ◽  
pp. 4303-4306 ◽  
Author(s):  
Haiyan Song ◽  
Pan Wang ◽  
Shi Li ◽  
Weiping Deng ◽  
Yanyun Li ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Pt Nanoparticles ◽  
Direct Conversion ◽  
Tungstic Acid

Direct conversion of cellulose to ethanol is achieved by using a combination of H2WO4 and Pt/ZrO2 catalysts in an aqueous medium.

Novel water-soluble multicolor halo- and photochromic switching system based on the nitrile-rich acceptor

2021 ◽  
Author(s):  
Mikhail Yu Belikov ◽  
Mikhail Yur'evich Ievlev ◽  
Ivan Nikolaevich Bardasov
Keyword(s):  
Aqueous Solution ◽  
Visible Light ◽  
Aqueous Medium ◽  
Water Soluble ◽  
Switching System ◽  
Directed Synthesis ◽  
Negative Photochromism

A directed synthesis of the first nitrile-rich dye showing visible-light-induced negative photochromism in aqueous medium was implemented. The possibility to change the color of an aqueous solution from yellow to...

Visible Light Photocatalyzed Direct Conversion of Aryl-/Heteroarylamines to Selenides at Room Temperature

2014 ◽  
Vol 16 (6) ◽  
pp. 1814-1817 ◽  
Author(s):  
Debasish Kundu ◽  
Sabir Ahammed ◽  
Brindaban C. Ranu
Keyword(s):  
Visible Light ◽  
Room Temperature ◽  
Direct Conversion
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