Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 69, Issue 2, Pages 624-628Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2007.05.013
Keywords
imidazole; 1-methylimidazole; Schiff base complex; charge transfer complex; formation constant; thermodynamic parameters
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The water-soluble cobalt(II) tetradentate Schiff base complex [Co(II)L](ClO4)(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 (epsilon'), 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= 0.2 mol dm(-3) KNO3) at pH 6.0 and various temperatures between 292 and 315 K. (C) 2007 Elsevier B.V. All rights reserved.
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