Synthesis, crystal structure, Cu2+ doped EPR and voltammetric studies of bis[N-(2-hydroxyethyl)ethylenediamine]zinc(II) squarate monohydrate

Ucar I., Karabulut B., Bulut A., Buyukgungor O.

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, vol.68, no.1, pp.45-52, 2007 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 68 Issue: 1
  • Publication Date: 2007
  • Doi Number: 10.1016/j.jpcs.2006.09.008
  • Journal Name: JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.45-52
  • Keywords: electron paramagnetic resonance (EPR), ELECTRON-PARAMAGNETIC-RESONANCE, ELECTROCHEMICAL-BEHAVIOR, POLYMERIC COMPLEXES, MAGNETIC-PROPERTIES, OPTICAL-ABSORPTION, ACID, LIGANDS
  • Ondokuz Mayıs University Affiliated: No

Abstract

Crystal structure of [Zn(hydet-en)(2)] center dot C4O4 center dot H2O (ZHES) (hydet-en is N-(2-hydroxyethyl)ethylenediamine) complex has been synthesized and characterized by analytical, spectroscopic (IR, UV/Vis) and voltammetric techniques. After doping Cu2+ ion, its magnetic environment has been identified by electron paramagnetic resonance (EPR) technique. The title complex crystalizes in monoclinic system with space group P2(1)/c and with Z = 4. Each hydet-en ligand acts as a tridentate ligand through the two N atoms and the hydroxyl O atom, resulting in a six coordinate Zn(II) ion. The EPR spectra were recorded in three perpendicular planes of Cu2+ doped ZHES single crystal. The calculated g and A values indicated that the paramagnetic center is rhombic symmetry with the Cu2+ ion having distorted octahedral environment. The molecular orbital bond coefficients of the Cu(II) ion in d(9) state is also calculated by using EPR and optical absorption parameters. The dianion SQ(2-) is oxidized reversibly in two consecutive steps to the corresponding radical monoanion and neutral form. (c) 2006 Elsevier Ltd. All rights reserved.