Structural characterization and EPR spectral studies on mononuclear copper(II) complex of saccharin with ethylnicotinate

Ucar I., Bozkurt E., Kazak C., Bulut A.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, cilt.72, sa.1, ss.11-16, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 72 Sayı: 1
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.saa.2008.06.046
  • Dergi Adı: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.11-16
  • Anahtar Kelimeler: X-ray crystal structure, EPR, IR, UV-vis, Cyclic voltammetry, RAY CRYSTAL-STRUCTURE, CU2+ DOPED EPR, BLADDER TUMORS, COORDINATION, HYDRATE, SAC
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

Mononuclear copper(II) saccharinate (sac) complex containing ethylnicotinate (enc). [Cu(enc)(2)(sac)(2) (H2O)]center dot 1.4H(2)O has been synthesized and characterized by spectroscopic (IR, UV-vis, EPR), X-ray diffraction technique and electrochemical methods. it crystallizes in the tetragonal crystal systems with space group 14(1)cd and Z= 8. The copper(II) ion presents a CuN4O distorted square pyramidal coordination. Based on EPR and optical absorption studies, spin-Hamiltonian and bonding parameters have been calculated. The g-values, calculated for title complex in polycrystalline state at 298 K and in frozen DMF (110 K). indicate the presence of the unpaired electron in the d(x2-y2) orbital. The evaluated metal-ligand bonding parameters showed strong in-plane sigma and in-plane pi-bonding. Some comparisons with related structures are made and the most important features of its IR spectrum were also discussed. The cyclic voltammogram of the title complex investigated in DMF (dimethylformamide) solution exhibits only metal centred electroactivity in the potential range +/- 1.25 V vs. Ag/AgCl reference electrode. (C) 2008 Elsevier B.V. All rights reserved.