Acta Chimica Sinica ›› 1994, Vol. 52 ›› Issue (5): 485-488. Previous Articles     Next Articles

Original Articles

氯冉酸阴离子桥联的Nd(III)-Nd(III), Dy(III)-Dy(III)和 Ho(III)-Ho(III)双 核配合物的合成与磁性

姜宗慧;刘宗明;廖代正;王耕霖   

  1. 南开大学元素有机化学国家重点实验室;南开大学化学系.天津(300071)
  • 出版日期:1994-05-15 发布日期:1994-05-15

Syntheses and magnetic properties of binuclear Nd(III)-Nd(III), Dy (III)-Dy(III) and Ho(III)-Ho(III) complexes with dianion of chloranilic acid as bridging ligands

Jiang Zonghui;Liu Zongming;Liao Daizheng;Wang Genglin   

  1. Nankai Univ, Dept Chem.Tianjin(300071)
  • Online:1994-05-15 Published:1994-05-15

Three binuclear Nd(III)-Nd(III), Dy(III)-Dy(III) and Ho(III)-Ho(III) complexes containing the dianion of chloranilic acid (CA) as bridging ligand have been synthesized, namely Ln~2(Phen)~4(CA)(NCS)~4 (Ln=Nd, Dy, Ho; Phen=1, 10-phenanthroline; CA=dianion of chloranilic acid). They have been characterized by elemental analyses, IR and electronic spectra, conductance and variable-temperature magnetic susceptibility. The observed susceptibility data were fit to those from theoretical magnetic equation by least-squares method, giving the parameters: Z'J'=-0.79(Nd), -0.67(Dy), -0.63cm^-^1(Ho); It indicates the existence of very weak antiferromagnetic spin exchange interaction between the rare earth ions in the complexes. Δ=-0.16(Nd), -0.76(Dy), -2.55cm^-^1(Ho); g=0.618(Nd), 1.739(Dy), 1.601(Ho); the agreement factor R≈10^-^4.

Key words: MAGNETISM, SYNTHESIS, DINUCLEAR COMPLEX, RARE EARTH, EXCHAHNGE INTERACTIONS, ANTIFERROMAGNETISM, INFRARED SPECTROPHOTOMETRY, ELEMENTAL ANALYSIS

CLC Number: