Synthesis, structure, magnetic properties and aqueous optical citrate detection of chiral dinuclear CuII complexes

Snehadrinarayan Khatua, Kibong Kim, Jina Kang, Jung Oh Huh, Chang Seop Hong, David G. Churchill

Research output: Contribution to journalArticle

16 Citations (Scopus)


Two chiral dimeric CuII Schiff base complexes, Na 2[Cu(S-lys)2.(H2O)2].(ClO 4)2 (1) and [Cu(S-ornH)2.(H2O) 2].(ClO4)2 (2) have been prepared by an easy one-pot method in which, the Llysine and L-ornithine-based Schiff base ligands are generated in situ. These complexes have been characterized by various spectroscopic techniques and single-crystal X-ray diffraction. The molecular structures show that both, complexes are indeed dimeric with CuII centers that are phenolate-bridged. Variable-temperature magnetic analysis revealed that a strong antiferromagnetic coupling interaction was mediated through the phenolate bridge between the two CuII centers. Since these compounds were highly soluble in water, we explored carboxylate sensing capability through colorlmetric indicator displacement assays (IDAs). By using pyrocatechol violet (PV) as a displaceable colorimetric indicator, citrate ion selectivity was demonstrated in 100% water solution in the physiological pH range.

Original languageEnglish
Pages (from-to)3266-3274
Number of pages9
JournalEuropean Journal of Inorganic Chemistry
Issue number22
Publication statusPublished - 2009 Aug 1



  • Chiral dicopper complex
  • Citrate detection
  • Magnetic properties
  • Schiff bases
  • Structure elucidation

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this