Synthesis, crystal structure, spectroscopic, fluorescent, thermal properties and EPR spectra of doped Cu2+ ions in [Cd(sac)(2)(H2O)(2)(meim)(2)] single crystal

FİDAN M., Semerci F., Sahin E., Yesilel O. Z., Tapramaz R., ŞAHİN Y.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, cilt.110, ss.437-442, 2013 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 110
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.saa.2013.02.013
  • Dergi Adı: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.437-442
  • Anahtar Kelimeler: Saccharinate, Meim, EPR, TGA, Cu, Coordination complex, SACCHARINATO COMPLEXES, METAL-COMPLEXES, COPPER(II), COORDINATION, PYRAZINE, NI(II)
  • Atatürk Üniversitesi Adresli: Evet

Özet

The crystal structures of the six-coordinate complexes [Cd(sac)(2)(H2O)(2)(meim)(2)] (complex 1) formed by reaction of 4-methylimidazole(meim) with [Cd(sac)(2)(H2O)(4)]center dot 2H(2)O (saccharinate = sac), was synthesized and characterized by elemental analysis, infrared (IR) and electron paramagnetic resonance (EPR) spectroscopy, thermal analysis and X-ray single crystal diffraction. X-ray diffraction analysis revealed that complex 1 crystallized in the monoclinic crystal system with space group P2(1)/c. The Cd(II) center was six-coordinated with four nitrogen atoms from two sac and two 4-meim ligands, two oxygen atoms from two aqua ligands. Spectral and thermal analysis data for complex 1 was in agreement with the crystal structures. In addition complex 1 displayed blue fluorescent emission in the solid state at room temperature. Single crystal EPR spectra at room temperature are resolved and have exhibited that two different Cu2+ complexes were located in different chemical environments which contained two magnetically non-equivalent Cu2+ sites. In low temperature EPR spectra down to 110 degrees C did show no considerable change. At higher temperatures, however, both thermo gravimetric analyses (TGA) and EPR spectra showed detectable changes around 140 degrees C; the causes and the mechanisms of changes are discussed. (C) 2013 Elsevier B.V. All rights reserved.