Ghosh, Indrajit and Koenig, Burkhard (2016) Chromoselective Photocatalysis: Controlled Bond Activation through Light-Color Regulation of Redox Potentials. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 55 (27). pp. 7676-7679. ISSN 1433-7851, 1521-3773
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Catalysts that can be regulated in terms of activity and selectivity by external stimuli may allow the efficient multistep synthesis of complex molecules and pharmaceuticals. Herein, we report the light-color regulation of the redox potential of a photocatalyst to control the activation of chemical bonds. Light-color control of the redox power of a photocatalyst introduces a new selectivity parameter to photoredox catalysis: Instead of changing the catalyst or ligand, alteration of the color of the visible-light irradiation adjusts the selectivity in catalytic transformations. By using this principle, the selective activation of aryl-halide bonds for C-H arylation and the sequential conversion of functional groups with different reduction potentials is possible by simply applying different colors of light for excitation of the photocatalyst.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ARYL DIAZONIUM SALTS; FLUORESCENT-PROBES; ELECTRON-TRANSFER; DYNAMIC CONTROL; CATALYSIS; ARYLATION; DYES; C-H arylation; dyes; photocatalysis; radicals; radical anions |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Organische Chemie Chemistry and Pharmacy > Institut für Organische Chemie > Lehrstuhl Prof. Dr. Burkhard König |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Mar 2019 11:20 |
| Last Modified: | 15 Mar 2019 11:20 |
| URI: | https://pred.uni-regensburg.de/id/eprint/3745 |
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