Magnetic characterization, synthesis and crystal structure of a heterodinuclear Cu<SUP>II</SUP>Gd<SUP>III</SUP> Schiff base complex bridged by the two phenolic oxygen atoms

Zeyrek C. T., Elmali A., Elerman Y.

JOURNAL OF MOLECULAR STRUCTURE, cilt.740, sa.1-3, ss.47-52, 2005 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 740 Sayı: 1-3
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1016/j.molstruc.2005.01.019
  • Dergi Adı: JOURNAL OF MOLECULAR STRUCTURE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.47-52
  • Anahtar Kelimeler: heterodinuclear complex, copper, gadolinium, ferromagnetic coupling, Schiff base, CU, GD, TRANSITION, BEHAVIOR, DESIGN
  • Ankara Üniversitesi Adresli: Hayır

Özet

A novel heterodinuclear complex formed by the reaction of gadolinium nitrate with Schiff base complex of copper(II) has been synthesized and characterized. Preparation, crystal structure and magnetic properties of the heterodinuclear complex, LCu(Me2CO)Gd(NO3)(3), (L=(N,N'-bis(2,3-dihydroxybenzylidene)-1,3-diaminopropane) are reported. The complex is consisting of a deca-coordinated Gd-III ion which is bridged to four coordinated Cu-II via both phenolate oxygen atoms of the L Schiff base ligand. The average Cu center dot center dot center dot Gd separation is 3.475(2) angstrom. There is also one non-coordinating acetone molecule in the crystal structure. The magnetic susceptibility of the complex was measured over the range 4.5-350 K and the observed data were successfully simulated by the equation based on the spin-Hamiltonian operator H = -JS(Cu)center dot S-Gd. The values of the intrachain interaction parameters have been deduced from the magnetic data: exchange integral J(Cu-Gd) = 7.3 cm(-1), g(Cu) = 2.17, g(Gd) = 2.09. This indicates a weak ferromagnetic spin exchange interaction between Cu-II and Gd-III ions. The nature of the magnetic super-exchange interaction of the title compound is compared with similar (CuGdIII)-Gd-III heterodinuclear complexes. (c) 2005 Elsevier B.V. All rights reserved.