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Application of Visible‐to‐UV Photon Upconversion to Photoredox Catalysis: The Activation of Aryl Bromides
Author(s) -
Majek Michal,
Faltermeier Uwe,
Dick Bernhard,
PérezRuiz Raúl,
Jacobi von Wangelin Axel
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201502698
Subject(s) - photochemistry , photon upconversion , aryl , chemistry , quenching (fluorescence) , butane , spectroscopy , catalysis , ultrafast laser spectroscopy , fluorescence , electron transfer , organic chemistry , alkyl , ion , physics , quantum mechanics
The activation of aryl–Br bonds was achieved by sequential combination of a triplet–triplet annihilation process of the organic dyes, butane‐2,3‐dione and 2,5‐diphenyloxazole, with a single‐electron‐transfer activation of aryl bromides. The photophysical and chemical steps were studied by time‐resolved transient fluorescence and absorption spectroscopy with a pulsed laser, quenching experiments, and DFT calculations.