Electron transfer in a donor-substituted acridinium dye: evidence for dynamical solvent control |
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| Affiliation: | 1. Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA;2. Department of Chemistry and the Photonics Center, Boston University, Boston, MA 02215, USA;1. N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation;2. Higher Chemical College of the Russian Academy of Sciences, D. I. Mendeleev University of Chemical Technology of Russia, 125047 Moscow, Russian Federation;3. Department of Chemistry, M. V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation;4. National Research University Higher School of Economics, 101000 Moscow, Russian Federation;1. Centro de Química, Instituto Venezolano de Investigaciones Científicas (IVIC), Apartado 21827, Caracas, 1020-A, Venezuela;2. Institute of Chemistry, University of Campinas, P.O. Box 6154, 13083-970, Campinas, Brazil;1. Department of Organic Chemistry, Southern Federal University, Zorge 7, 344090 Rostov-on-Don, Russian Federation;2. Institute of Physical and Organic Chemistry, Southern Federal University, Stachki 194/2, 344090 Rostov-on-Don, Russian Federation;3. Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland;4. Department of Physics, Industrial University of Tyumen, Volodarskogo 38, 625-000 Tyumen, Russian Federation |
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| Abstract: | Time-resolved emission is used to explore the intramolecular excited-state electron transfer in a donor-substituted acridinium dye in a variety of solvents at room temperature. Emission decays are predominantly bi-exponential, with the faster of the two time constants being a good measure of the charge transfer time. In 14 high-polarity solvents this time is correlated to the solvation times previously measured with the solvation probe Coumarin 153 via an apparent power law, τLE→CT≈8.4〈τ〉solv0.65. In solvents less polar than acetone the times observed deviate widely from this relationship, probably due to the effects of ion pairing. |
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