Synthesis and Magnetism of Copper(II)-Lanthanoid(III) Heterobinuclear Complexes with N,N'

• Autorzy: Li Y.-T. , Yan C. -W. , Wang G.-M.
• Języki publikacji: EN

Abstrakty

EN

Eleven novel ž-oxamido-bridged copper(II)-lanthanoid(III) heterobinuclear complexes described by the overall formula Cu(obp)Ln(Ph2-phen)2ClO4 (Ln = Y, La, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb), where obp denotes N,N_-oxamidobis(propionato) and Ph2-phen represents 4,7-diphenyl-1,10-phenanthroline (Ph2-phen), have been synthesized and characterized by elemental analyses, spectroscopic (IR, UV, ESR) studies, and molar conductivity measurements. The temperature dependence of the magnetic susceptibility of complex Cu(obp)Gd(Ph2-phen)2ClO4 has been measured over the range 4.2~300 K and the magnetic properties were studied in detail, demonstrating the presence of a very weak ferromagnetic interaction between the adjacent Gd(III) and Cu(II) ions through the oxamido-bridge. Based on the spin Hamiltonian operator, _ _ _ H = 2JS S 1 2 _ _ , the exchange integral (J) was evaluated as +2.98 cm-1. A plausible mechanism for the ferromagnetic coupling between Gd(III) and Cu(II) is discussed in terms of spin-polarization.

Słowa kluczowe

EN

mi-oxamido; heterobinuclear complexes; copper(II)-lanthanoid(III); magnetism

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2002
• Tom: Vol. 76 / nr 5
• Strony: 653--662
• Opis fizyczny: Biblioigr. 26 poz., rys.

Twórcy

autor

Li Y.-T.

• Department of Chemistry, Qufu Normal University, Qufu, Shandong, 273165, P. R. China

autor

Yan C. -W.

• Department of Biology, Qufu Normal University, Qufu, Shandong, 273165, P. R. China

autor

Wang G.-M.

• Department of Chemistry, Qufu Normal University, Qufu, Shandong, 273165, P. R. China

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