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- W2951930239 abstract "The ESR linewidths of semiquinone anions of xanthene dyes in alkaline protic solvents were studied as functions of the temperature and the viscosity. It was found that the linewidths of phloxine semiquinone, the ESR spectra of which show three hyperfine lines due to two equivalent protons, decrease with a decrease in the temperature or an increase in the viscosity of the solvents, and vary unimolecularly. Such a variation can not be explained either by a usual “chemical exchange” process between different states or by intramolecular motion. We propose that the linewidths may be due to the modulation of the hyperfine coupling constants of H atoms; the modulation results from the dissociation and/or distortion of the hydrogen bonds." @default.
- W2951930239 created "2019-06-27" @default.
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- W2951930239 date "1974-09-03" @default.
- W2951930239 modified "2023-09-25" @default.
- W2951930239 title "ChemInform Abstract: STUDIES OF THE ESR SPECTRA OF SEMIQUINONE ANIONS OF XANTHENE DYES. VARIATION IN THE LINEWIDTH OF THE PHLOXINE SEMIQUINONE ANION WITH THE TEMPERATURE AND THE VISCOSITY IN PROTIC SOLVENTS" @default.
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- W2951930239 doi "https://doi.org/10.1002/chin.197435050" @default.
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