Synthesis and magnetic Properties of mi-2-Nitroterephthalato-Bridged Binuclear Lanthanide(III) Complexes

• Autorzy: Li Y. , Zhang J. , Yan C. -W.
• Języki publikacji: EN

Abstrakty

EN

Nine new binuclear lanthanide(III) complexes described by the overall formula [Ln2(NTPHA)(Me2bpy)4(ClO4)2](ClO4)2 (Ln = La, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er), where Me2bpy stands for 4,4_-dimethyl-2,2_-bipyridine, and NTPHA represents the 2-nitroterephthalate dianions, have been synthesized and characterized by elemental analyses, IR, ESR and electronic spectra, and molar conductance measurements. It is proposed that these complexes present NTPHA-bridged structures consisting of two lanthanide(III) ions. The variable-temperature magnetic susceptibilities (4~300 K) of complex [Gd2(NTPHA)(Me2bpy)4(ClO4)2](ClO4)2 were measured and studied, demonstrating a very weak antiferromagnetic spin-exchange interaction between Gd(III)-Gd(III) ions within the complex. Based on the spin Hamiltonian operator,_ _ _ H = 2JS S 1 Ĺ 2, the exchange parameter (J) was evaluated as -0.12 cm-1.

Słowa kluczowe

EN

mi-2-nitroterephthalato-bridge; binuclear lanthanide(III) complexes; magnetism; synthesis

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2003
• Tom: Vol. 77 / nr 7
• Strony: 797--804
• Opis fizyczny: Bibliogr. 28 poz., rys.

Twórcy

autor

Li Y.

• Marine Drug & Food Institute, Ocean University of China, 5 Yushan Road, Qingdao, Shandong, 266003, P. R. China

autor

Zhang J.

• College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, P. R. China

autor

Yan C. -W.

• College of Marine Life Science, Ocean University of China, Qingdao, Shandong, 266003, P. R. China

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