The synthesis and characterization of 22-membered diazapentathia macrocycles and investigation of their ion extraction capability from aqueous media

GOK H. Z., OCAK U., Kantekin H., Alp H.

TRANSITION METAL CHEMISTRY, vol.32, no.8, pp.1073-1078, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 32 Issue: 8
  • Publication Date: 2007
  • Doi Number: 10.1007/s11243-007-0290-7
  • Journal Name: TRANSITION METAL CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1073-1078
  • Karadeniz Technical University Affiliated: Yes

Abstract

Two new macrocyclic ligands, (5) and (6), containing nitrogen-sulfur donor atoms were designed and synthesized in a multi-step reaction sequence. Ion extraction capability of macrocycles (5) and (6) were investigated involving solvent extraction of metal picrates such as Ag+, Hg2+, Cd2+, Zn2+, Cu2+, Ni2+, Mn2+, Co2+ and Pb2+ from aqueous phase to the organic phase. The metal picrate extractions were carried out at 25 +/- 0.1 degrees C and extractions were measured by u.v.-visible spectrometry. The extractability and selectivity of the mentioned metal picrates were evaluated depending on the organic solvents used for extraction. The extraction constant (log K-ex) and the complex composition of each metal complex were determined using spectroscopic methods.