Synthesis and Properties of Phenothiazine Derivatives. 2. Spectral (ESR and IR) Characteristics of the Radical-cations of the Phenothiazine N-Derivatives |
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| Authors: | O. B. Tomilin A. N. Shchegolikhin E. P. Sanaeva A. N. Klyakin L. B. Ryabkina E. P. Konovalova |
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| Affiliation: | (1) Mordovian State University, 430000 Saransk, Russia;(2) Institute of Biochemical Physics, Russian Academy of Sciences, 117334 Moscow, Russia |
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| Abstract: | The temperature dependence of the ESR spectra of the radical-cations of the N-derivatives of phenothiazine were studied in the range of 200-393 K (o-xylene). It was established that at temperatures of 323-333 K the nature of the HFS varies from doublet to quartet with approximate intensity ratios of 1:2:2:1, and this transformation is irreversible. A hypothesis explaining the results is proposed. IR spectroscopy was used to confirm the proposed mechanism of localization of the unpaired electron. |
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| Keywords: | phenothiazine radical-cation IR spectroscopy ESR spectroscopy |
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