Some Reversible and Irreversible Electrode Processes at DME. A Study on Uranyl and Zinc Complexes of L-Hydroxyproline in Aqueous and Aqueous-Methanolic Solutions

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概要

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• Complexes of zinc and uranyl ions with L-hydroxyproline (LHP) have been investigated by polarographic method of analysis at 25±1 and 35±1 °C. At pH 4.5, formation of uranyl-LHP complex was observed with metal to ligand ratio of 1: 1 in aqueous and aqueous-methanolic solutions. The stability constant for the complex species is log<I>K</I><SUB>c</SUB>=1.50, 1.30, 1.61, 1.87 in aqueous (25 °C), aqueous (35 °C), aqueous-methanolic (10% v/v) and aqueous-methanolic (50% v/v) media respectively. Between pH 3.0–12.0, zinc–LHP complex has been observed to be reduced irreversibly at DME. Detailed investigations have been reported on the system at 25±1 °C and 35±1 °C at pH 10.0 in varying concentrations of the ligand. Kinetic parameters—the formal rate constant <I>K</I><SUB>f,h</SUB><SUP>°</SUP> and transfer coefficient α have been calculated.

• 公益社団法人 日本化学会の論文

著者

• Rawat P.

  Department of Chemistry, M.R. Engineering College

• Gupta C.

  Chemical Laboratories, University of Rajasthan

関連論文

• Some Reversible and Irreversible Electrode Processes at DME. A Study on Uranyl and Zinc Complexes of L-Hydroxyproline in Aqueous and Aqueous-Methanolic Solutions

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