Synthesis, characterization and emission study of zinc(II) and cobalt(II) complexes: Bis(bidentate) iminophenols as zinc(II) selective fluorescence probes

Biswarup Chakraborty, Partha Halder, Sourav Chakraborty, Oindrila Das, Sayantan Paria

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Two zinc(II) complexes, [Zn II 2(L 1) 2] (1) and [Zn II 2(L 2) 2] (2), and two cobalt(II) complexes, [Co II 2(L 1) 2] (3) and [Co II 2(L 2) 2] (4), (H 2L 1 = iminophenol derived from the condensation of 4-aminobenzylamine and salicyldehyde, H 2L 2 = Schiff-base of 4-aminobenzylamine and 3,5-di-tert-butylsalicyldehyde) supported by bis(N,O-bidentate) ligands have been synthesized and characterized. X-ray single crystal structures of 3 and 4 revealed the dimeric nature of the complexes with a 1:1 ratio of metal and ligand. The zinc(II) complexes have a very similar composition as established from different analytical and spectroscopic techniques. The iminophenols exhibit highly selective fluorescence enhancement with high quantum yield upon binding with Zn 2+ in solution. A 50-fold enhancement of emission in zinc(II) complexes is observed with respect to free iminophenols.

Original languageEnglish
Pages (from-to)332-337
Number of pages6
JournalInorganica Chimica Acta
Volume387
DOIs
StatePublished - 30 May 2012
Externally publishedYes

Keywords

  • Cobalt
  • Fluorescence
  • Iminophenol
  • Solid state structures
  • Zinc

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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