摘要
合成和表征了３种新型的对苯二甲酸根桥联的双钴（Ⅱ）配合物：［Ｃｏ２（ＴＰＨＡ）（ＮＯ２－ｐｈｅｎ）４」（ＣＩＯ４）２·Ｈ２Ｏ（１），［Ｃｏ２（ＴＰＨＡ）（ｔｍｅｎ）４］（ＣＩＯ４）２（２）和［ＣＯ２（ＴＰＨＡ）（ｔｍｄ）４」（ＣＩＯ４）：（３）．经元素分析、红外光谱、电子光谱、电导和磁性测量等手段推定配合物具有对苯二甲酸根桥联结构，Ｃｏ（Ⅱ）离子处于畸变的八面体环境．测定了配合物（１）和（２）的变温（４～３００Ｋ）磁化率，其数值与自旋哈密顿算符ｈ＝－２ＪＳ１·Ｓ２导出的磁方程拟合，求得交换积分Ｊ分别为－２．９５ｃｍ－１（１）和－１．２４ｃｍ－１（２），表明双核配合物中金属离子间存在弱的反铁磁性超交换作用．
Three new binuclear cobalt(Ⅱ) complexes, i. e., [Co2(TPHA) (NO2--phen )4] (ClO4)2.H2O(1),[Co2(TPHA)(tmen)4] (ClO4)2(2), and [Co2 (TPHA)(tmd)4](ClO4 )2 (3) have been synthesised and characterized. bend on IR,electronic spectra,elementul analysis, and conductivity measurement, these complexes are proposed to have extended TPHA-bridged structures and to consist of two cobalt(Ⅱ) ions in a distorted octahedron environment. The temperature dependence of the magnetic susceptibility of (1) and (2) is measured over 4-300K and the obeerved data are sucmefully simulated by the equation besed on spin Hamiltoninn operator(H=- 2JS1·S2),giving the exchange integral J=-2. 95cm-1(1) and J= .24cm-1(2), respectively. This indicates a weak antiferromagnetic interaction between the metal ions.
出处
《烟台大学学报（自然科学与工程版）》
CAS
1996年第2期46-50,共5页
Journal of Yantai University(Natural Science and Engineering Edition)
关键词
磁性
TPHA
钴配合物
双核配合物
磁交换作用
cobalt(Ⅱ) binuclear complexes
synthesis
variable-temperature magnetic susceptibility
magnetism
