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Title: Thermodynamics of some long-chain biradicals studied by EPR spectroscopy
Authors: Sankarapandi, S.
Rifkind, J.M.
Manoharan, P.T.
Keywords: Computer simulation; Conformations; Electron spin resonance spectroscopy; Mathematical models; Paramagnetic resonance; Thermodynamics; Biradicals; Conformational changes; Dithiothreitol; Electron paramagnetic resonance spectroscopy; Fast and slow exchanges; Spin labelling; Molecules
Issue Date: 1994
Publisher: Springer India
Citation: Proceedings of the Indian Academy of Sciences - Chemical Sciences, 106(6), 1329-1340
Abstract: Four biradicals of differing chain lengths have been prepared by spin-labelling the sulphhydryl groups of dithiothreitol. Temperature-dependent EPR spectra of these biradicals indicate that the dynamics of biradicals is associated with both fast and slow exchanges of conformations. The three-conformational model incorporating cage configuration is found to be more appropriate. Certain thermodynamic parameters of conformationalchanges have been calculated from the experimental EPR parameters, obtained by the use of simulation procedures developed recently. ? 1994 Indian Academy of Sciences.
ISSN: 2534134
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