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Synthesis, characterization, spectroscopic and thermodynamic studies of charge transfer interaction of a new water-soluble cobalt(II) Schiff base complex with imidazole derivatives.

Boghaei DM, Askarizadeh E, Bezaatpour A

Department of Chemistry, Sharif University of Technology, Azadi Ave., P.O. Box 11155-9616, Tehran, Iran.

The water-soluble cobalt(II) tetradentate Schiff base complex [Co(II)L](ClO(4))(2), L: (N,N'-bis{5-[(triphenylphosphonium)-methyl]salicylidine}-o-phenylenediamineperchlorate has been synthesized and characterized. This complex forms charge transfer (CT) complexes with imidazole and 1-methylimidazole. The formation constant, molar absorptivity (varepsilon'), and thermodynamic parameters for charge transfer complexes formation of cobalt(II) Schiff base complexes with imidazole derivatives were determined by using UV-vis spectrophotometric method in aqueous solutions at constant ionic strength (I=0.2moldm(-3) KNO(3)) at pH 6.0 and various temperatures between 292 and 315K.

Published 4 February 2008 in Spectrochim Acta A Mol Biomol Spectrosc, 69(2): 624-8.
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