Visible light-induced thiol-ene reaction: A new strategy to prepare Α,ω-dithiol and Α,ω-divinyl telechelic polythiolether oligomers

2015 ◽  
Vol 54 (6) ◽  
pp. 740-749 ◽  
Author(s):  
Wenchao Ma ◽  
Dong Chen ◽  
Lianying Liu ◽  
Yuhong Ma ◽  
Li Wang ◽  
...  
Keyword(s):  
Visible Light ◽  
Ene Reaction ◽  
New Strategy

scholarly journals Metal-free visible light photoredox enables generation of carbyne equivalents via phosphonium ylide C–H activation

2019 ◽  
Vol 10 (6) ◽  
pp. 1687-1691 ◽  
Author(s):  
Mrinmoy Das ◽  
Minh Duy Vu ◽  
Qi Zhang ◽  
Xue-Wei Liu
Keyword(s):  
Visible Light ◽  
Bond Formation ◽  
Formation Processes ◽  
New Approach ◽  
Carbon Bond ◽  
Metal Free ◽  
Carbon Carbon Bond ◽  
Carbon Carbon Bonds ◽  
Carbon Bonds ◽  
New Strategy

Phosphonium ylides have shown their synthetic usefulness in important carbon–carbon bond formation processes. Our new strategy employs phosphonium ylides as novel carbyne equivalents and features a new approach for constructing carbon–carbon bonds from alkenes.

Modification of gold nanoparticles with a hole-transferring cocatalyst: A new strategy for plasmonic water splitting under irradiation of visible light

2021 ◽  
Author(s):  
Eri Fudo ◽  
Atsuhiro Tanaka ◽  
Shoji Iguchi ◽  
Hiroshi Kominami
Keyword(s):  
Gold Nanoparticles ◽  
Metal Oxide ◽  
Visible Light ◽  
Water Splitting ◽  
Organic Compounds ◽  
New Strategy

Plasmonic water splitting (H2O → H2 + 1/2O2) over a metal-loaded metal oxide under irradiation of visible light is still difficult, although conversion of organic compounds over plasmonic photocatalysts has...

Visible-light-induced intramolecular radical cascade of α-bromo-N-benzyl-alkylamides: a new strategy to synthesize tetracyclic N-fused indolo[2,1-a]isoquinolin-6(5H)-ones

2020 ◽  
Vol 18 (2) ◽  
pp. 263-271 ◽  
Author(s):  
Xiaoshuang Gao ◽  
Chengyang Li ◽  
Yao Yuan ◽  
Xiaomin Xie ◽  
Zhaoguo Zhang
Keyword(s):  
Natural Products ◽  
Visible Light ◽  
Materials Science ◽  
New Strategy ◽  
Radical Cascade

Polycyclic indole scaffolds are ubiquitous in pharmaceuticals and natural products and in materials science.

scholarly journals Ultrasonication-Assisted Synthesis of ZnxCd1−xS for Enhanced Visible-Light Photocatalytic Activity

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 276
Author(s):  
Lei Yang ◽  
Maolin Zhang ◽  
Mingzhu Liu ◽  
You Fan ◽  
Haijie Ben ◽  
...  
Keyword(s):  
Solid Solution ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Band Gap ◽  
Degradation Mechanism ◽  
Hydrothermal Route ◽  
New Strategy ◽  
Stable Performance ◽  
Band Gap Structure ◽  
Gap Structure

ZnxCd1−xS as a solid solution photocatalyst has attracted widespread attention for its unique adjustable band gap structure and good and stable performance. A novel synthesis approach for ZnxCd1−xS is still required to further improve its performance. In this study, we synthesized a series of ZnxCd1−xS (x = 0−1) solid solutions via an ultrasonication-assisted hydrothermal route. In comparison with conventional methods of preparation, the sample prepared by our innovative method showed enhanced photocatalytic activity for the degradation of a methyl orange (MO) solution under visible light due to its high crystallinity and small crystallite size. Furthermore, the composition and bandgap of ZnxCd1−xS can be tuned by adjusting the mole ratio of Zn2+/Cd2+. Zn0.3Cd0.7S shows the highest level of activity and stability for the degradation of MO with k = 0.85 h−1, which is 2.2 times higher than that of CdS. The balance between band gap structure-directed redox capacity and light absorption of Zn0.3Cd0.7S accounts for its high photocatalytic performance, both of which are determined by the composition of the solid solution. Also, a degradation mechanism of MO over the sample is tentatively proposed. This study demonstrates a new strategy to synthesize highly efficient sulfide photocatalysts.

Light-Driven Deracemization Enabled by Excited-State Electron Transfer

2019 ◽  
Author(s):  
Nick Shin ◽  
Jonathan Ryss ◽  
Xin Zhang ◽  
Scott Miller ◽  
Robert Knowles
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Hydrogen Atom ◽  
Visible Light ◽  
Hydrogen Atom Transfer ◽  
Catalytic Cycle ◽  
Product Distributions ◽  
Reaction Proceeds ◽  
New Strategy ◽  
Molecular Catalysts

A new strategy for catalytic deracemization is presented, wherein amine derivatives undergo spontaneous optical enrichment upon exposure to visible light in the presence of three distinct molecular catalysts. Initiated by an excited-state iridium chromophore, this reaction proceeds <i>via </i>a sequence of favorable electron, proton, and hydrogen atom transfer steps that serve to break and reform a stereogenic C–H bond. The enantioselectivity in these reactions is jointly determined by two independent stereoselective steps that occur in sequence within the catalytic cycle, giving rise to a composite selectivity that is higher than that of either step individually. These reactions represent a distinct and potentially general approach to creating out-of-equilibrium product distributions between substrate enantiomers using excited-state redox events.

Molecular Iodine Catalyzed: Visible Light Initiated New Strategy for the Synthesis of Quinoxaline Derivatives via Aerobic Oxidation

2017 ◽  
Vol 7 (3) ◽  
Author(s):  
Snehlata Yadav ◽  
Madhulika Srivastava ◽  
Pratibha Rai ◽  
Anu Mishra ◽  
Bhartendu Pati Tripathi ◽  
...  
Keyword(s):  
Visible Light ◽  
Aerobic Oxidation ◽  
Molecular Iodine ◽  
Quinoxaline Derivatives ◽  
New Strategy

Nitrobenzoxadiazole-labelled polyisoprenoid alcohols

1996 ◽  
Vol 74 (12) ◽  
pp. 2531-2535 ◽  
Author(s):  
Bruce J. Balcom ◽  
Nils O. Petersen
Keyword(s):  
Carboxylic Acid ◽  
Visible Light ◽  
Singlet Oxygen ◽  
Key Words ◽  
Acid Derivative ◽  
Coupling Reaction ◽  
Double Bonds ◽  
Ene Reaction ◽  
Fluorescence Labelling ◽  
Carboxylic Acid Derivative

We have prepared, isolated, and characterized a series of nitrobenzoxadiazole labelled polyisoprenoid alcohols. The coupling reaction employed was a dicyclohexylcarbodiimide mediated condensation between a carboxylic acid derivative of nitrobenzoxadiazole and the polyisoprenoid alcohols citronellol, solanesol, and dolichol. Upon exposure to visible light, a self-sensitized singlet oxygen "ene" reaction oxidized double bonds in the isoprene moiety. The rate of oxidation is greatly reduced in solvents where singlet oxygen is short-lived. Key words: nitrobenzoxadiazole, isoprenoid, dolichol, citronellol, solanesol, fluorescence labelling, singlet oxygen, ene reaction.

Size-controlled synthesis of CdS nanoparticles confined on covalent triazine-based frameworks for durable photocatalytic hydrogen evolution under visible light

Nanoscale ◽  
2018 ◽  
Vol 10 (41) ◽  
pp. 19509-19516 ◽  
Author(s):  
Dengke Wang ◽  
Xiang Li ◽  
Ling-Ling Zheng ◽  
Lu-Mei Qin ◽  
Shuang Li ◽  
...  
Keyword(s):  
Visible Light ◽  
Hydrogen Evolution ◽  
Photocatalytic Performance ◽  
Cds Nanoparticles ◽  
Controlled Synthesis ◽  
Photocatalytic Hydrogen Evolution ◽  
New Strategy ◽  
Size Controlled

A new strategy was developed to improve the photocatalytic performance and stability of CdS via decorating CdS nanoparticles on covalent triazine-based frameworks.

ChemInform Abstract: Visible Light-Induced Intramolecular Cyclization Reactions of Diamines: A New Strategy to Construct Tetrahydroimidazoles.

ChemInform ◽  
2011 ◽  
Vol 42 (47) ◽  
pp. no-no
Author(s):  
Jun Xuan ◽  
Ying Cheng ◽  
Jing An ◽  
Liang-Qiu Lu ◽  
Xiao-Xiao Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Intramolecular Cyclization ◽  
Cyclization Reactions ◽  
New Strategy
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