Dichromatic Photocatalytic Substitutions of Aryl Halides with a Small Organic Dye
| Autor: | Raúl Pérez-Ruiz, Axel Jacobi von Wangelin, Víctor A. de la Peña O’Shea, Michal Majek, Diego Sampedro, Michael Neumeier |
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| Rok vydání: | 2017 |
| Předmět: |
010405 organic chemistry
Aryl Organic Chemistry Inorganic chemistry Halide General Chemistry Photon energy 010402 general chemistry Photochemistry 01 natural sciences Chemical reaction Catalysis 0104 chemical sciences Electron transfer chemistry.chemical_compound chemistry Excited state Photocatalysis |
| Zdroj: | Chemistry (Weinheim an der Bergstrasse, Germany). 24(1) |
| ISSN: | 1521-3765 |
| Popis: | Photocatalytic bond activations are generally limited by the photon energy and the efficiency of energy and electron transfer processes. Direct two-photon processes provide sufficient energy but the ultra-short lifetimes of the excited states prohibit chemical reactions. The commercial dye 9,10-dicyanoanthracene enabled photocatalytic aromatic substitutions of non-activated aryl halides. This reaction operates under VIS-irradiation via sequential photonic, electronic, and photonic activation of the simple organic dye. The resultant highly reducing excited photocatalyst anion readily effected C-H, C-C, C-P, C-S, and C-B bond formations. Detailed synthetic, spectroscopic, and theoretical studies support a biphotonic catalytic mechanism. |
| Databáze: | OpenAIRE |
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