Ghosh, Indrajit and Shaikh, Rizwan S. and Koenig, Burkhard (2017) Sensitization-Initiated Electron Transfer for Photoredox Catalysis. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 56 (29). pp. 8544-8549. ISSN 1433-7851, 1521-3773
Full text not available from this repository. (Request a copy)Abstract
Photosynthetic organisms exploit antenna chromophores to absorb light and transfer excitation energy to the reaction center where redox reactions occur. In contrast, in visible-light chemical photoredox catalysis, a single species (i.e., the photoredox catalyst) absorbs light and performs the redox chemistry. Mimicking the energy flow of the biological model, we report a two-center photoredox catalytic approach in which the tasks of light energy collection and electron transfer (i.e., redox reactions) are assigned to two different molecules. Ru(bpy)(3)Cl-2 absorbs the visible light and transfers the energy to polycyclic aromatic hydrocarbons that enable the redox reactions. This operationally simple sensitization-initiated electron transfer enables the use of arenes that do not absorb visible light, such as anthracene or pyrene, for photoredox applications. We demonstrate the merits of this approach by the reductive activation of chemical bonds with high reduction potentials for carbon-carbon and carbon-heteroatom bond formations.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ENERGY-TRANSFER; LIGHT; SUBSTITUTION; TRANSITION; REDUCTION; ARYLATION; COMPLEXES; IODIDES; C-H arylation; electron transfer; energy transfer; photocatalysis; polycyclic aromatic hydrocarbons |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Organische Chemie > Lehrstuhl Prof. Dr. Burkhard König |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:16 |
| Last Modified: | 11 Feb 2019 14:40 |
| URI: | https://pred.uni-regensburg.de/id/eprint/1549 |
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