Spectrophotometric investigation of the complex formation between aza-15-crown-5 containing chromoionophores and alkali and alkaline earth metal ions in acetonitrile.
Complexation of two cationic styryl dyes containing aza-15-crown-5 moiety and Na(+), K(+), Ca(2+) and Ba(2+) was investigated spectrophotometrically in water-containing acetonitrile medium. The ligand/complex ratio was estimated using a method for resolution of overlapping bands. A model for evaluation of the water action is proposed and stability constants were calculated for all metal ions in question.
Antonov
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Department of Chemistry, Sofia University "St Kl. Ohridski", 1 James Bourchier Ave., 1126 Sofia, Bulgaria.
Mateeva
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