Laboratory EXAFS determined structure of the stable complexes in the ternary Ni(ii)-EDTA-CN- system

Zoltán Németh, Éva G. Bajnóczi, Bogdán Csilla, György Vankó

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1 Citation (Scopus)

Abstract

Aqueous solutions of the ternary system Ni(ii)-EDTA-CN- are investigated with X-ray Absorption Spectroscopy (XAS) as a function of cyanide concentration with an enhanced laboratory von Hámos X-ray spectrometer. The near-edge structure of the spectra identifies unambiguously the formation of the pentacyanidonickel(ii) complex at excess CN- concentrations. An analysis of the extended energy range of the XAS spectra reveals the molecular structure of the distinct molecular components present and provides a detailed description of the barely detectable mixed ligand [NiEDTA(CN)]3- complex. This thorough Extended X-ray Absorption Fine Structure (EXAFS) study demonstrates the potential of the emerging laboratory XAS spectrometers to become routine probes in various areas of chemistry, materials science, physics and related disciplines.

Original languageEnglish
Pages (from-to)9239-9245
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume21
Issue number18
DOIs
Publication statusPublished - 2019

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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