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Reversible Photoactivated Phosphorescence of Gold(I) Arylethynyl Complexes in Aerated DMSO Solutions and Gels
Author(s) -
Wan Shigang,
Lu Wei
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201610762
Subject(s) - phosphorescence , photochemistry , singlet oxygen , chemistry , oxygen , sulfoxide , dimethyl sulfoxide , singlet state , phosphor , fluorescence , materials science , excited state , organic chemistry , optoelectronics , physics , quantum mechanics , nuclear physics
Phosphorescence in fluid solutions at ambient temperature is usually quenched by molecular oxygen via energy transfer, and singlet oxygen is concomitantly sensitized. The long‐lived phosphorescence of a series of Au I arylethynyl complexes with tunable emission energies in aerated dimethyl sulfoxide (DMSO) solutions can be completely and repeatedly switched on by controlled photoirradiation. A trace amount of DMSO oxidation by the sensitized singlet oxygen is proposed to lead to a depletion of molecular oxygen in the local microenvironment of the Au I phosphor in the photoactivation processes. Harnessing the photoactivated phosphorescence and using UV light as a non‐contact pen, a writing–erasing–rewriting prototype has been demonstrated with a DMSO gel containing Au I arylethynyl complexes.