摘要
合成了一种新型异三核配合物[Cu2(oxae)2Fe(H2O)2](ClO4)3,这里oxae是N,N’双(2氨基乙基)草酰胺二价阴离子。基于红外光谱、元素分析、电导的测量和电子光谱,推定了配合物具有扩展草酰胺桥联结构。研究了配合物的变温磁化率(15~300K),并用最小二乘法和从自旋Hamilton算符,^H=-2J(^S1·^S2+^S2·^S3)-2J′^S1·^S3,导出的磁方程拟合,求得交换积分J=-69.1cm-1,结果表明,配合物Fe(Ⅲ)和Cu(Ⅱ)离子间存在反铁磁自旋交换作用。同时测定了配合物室温下粉末ESR谱并进行了讨论。
Novel heterotrinuclear complex [Cu2(oxae)2Fe(H2O)2](ClO4)3 has been synthesized, where oxae is N,N'bis(2aminoethyl)oxamide dianion. Based on IR, elemental analyses, conductivity measurement and electronic spectra, the complex is proposed to have extended oxamidobridged structure. Variabletemperature magnetic susceptibility of the complex has been studied in the 1.5300K range and the observed date is fit by leastsquares to a susceptibility equation derived from the spin Hamilton operator,=-2J(1·2+2·3)-2J′1·3. The exchange intergral, J, has been found equal to -69.1 cm-1. This procedure indicates the existence of an antiferromagnetic spinexchange interaction between the Fe(Ⅲ) and Cu(Ⅱ) ions. The powder ESR spectrum of the complex has been obtained and discussed.
出处
《天津商学院学报》
1997年第4期1-5,共5页
Journal of Tianjin University of Commerce
关键词
异三核配合物
磁化率
ESR谱
铁
铜
Heterotrinuclear complex magnetic susceptibility ESR spectrum