Solvent motion and excited state decay in solutions of Cr(III) complexes |
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Affiliation: | 1. A.E. Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, Kazan 420088, Russian Federation;2. Molecular Tectonics Laboratory, University of Strasbourg, UMR UDS-CNRS 7140, Institut le Bel, 4, rue Blaise Pascal, F-67000 Strasbourg, France;3. Kazan Federal University, Kremlevskaya str.18, 420008 Kazan, Russian Federation |
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Abstract: | Thermal quenching of 2E in Cr(bpy)33+ (bpy = 2,2′-bipyridine) solutions where back-intersystem crossing is not important is compared with the quenching of Cr(NCS)63− and trans-Cr(NH3)2(NCS)4− in several solvents. Solvent motion enhances excited state relaxation whether or not back-intersystem crossing is a significant relaxation pathway. The relationship between motionally induced decay and the exponential or nonexponential character of the decay is discussed. |
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