Complexation kinetics of 8-quinolinol derivatives with Ni(II) and Zn(II) at the 1,2-dichloroethane-water interface as studied by electrolyte ascending electrode polarography

Takeshi Shioya, Seiichi Nishizawa, Norio Teramae

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Complexation kinetics of 8-quinolinol (HQ) and 5-alkyloxymethyl-8-quinolinols (HCnQ; n = 1, 2, 3, 5, 8) with metal ions M2+ (M = Ni, Zn) at the 1,2-dichloroethane (DCE)-water interface is analyzed by dynamic interfacial tensiometry and electrolyte ascending electrode polarography. Polarographic measurements show that the chemical species formed at the interface is a cationic 1:1 complex (M(Q)+ or M(CnQ)+). For Zn2+, the interfacial complexation is very fast, and its kinetics is controlled by the diffusion of ligands from the bulk DCE phase to the DCE-water interface. On the other hand, for Ni2+, the kinetics is interfacial reaction-controlled and is significantly affected by the alkyl chain length of the chelating reagents.

Original languageEnglish
Pages (from-to)2575-2579
Number of pages5
JournalLangmuir
Volume15
Issue number7
DOIs
Publication statusPublished - 1999 Mar 30

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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