Kinetic studies on the single electron transfer reaction between 2, 2, 6, 6-tetramethylpiperidine oxoammonium ions and phenothiazines: the application of Marcus theory |
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| Authors: | Longmin Wu Xia Guo Jun Wang Qingxiang Guo Zhongli Liu Youcheng Liu |
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| Affiliation: | (1) State Key Laboratory of Applied Organic Chemistry, Lanzhou University, 730000 Lanzhou, China;(2) Department of Chemistry, University of Science and Technology of China, 230026 Hefei, China |
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| Abstract: | Electron transfer reactions take place readily between 2, 2, 6, 6-tetramethylpiperidine oxoammonium ions (1a, 1b) and phenothiazines (2a-2g), giving corresponding nitroxides (3a, 3b) and phenothiazine radical cations (4a-4g). The rate constants for the electron self-exchange reactions between 1 and 3, as well as between 2 and 4, are determined by EPR and 1H NMR line-broadening effect in acetonitrile. By application of the Marcus theory, the kinetics of the cross-exchange reactions between 1 and 2 is studied. |
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| Keywords: | electron transfer reaction phenothiazine oxoammonium ion Marcus theory. |
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