论文部分内容阅读
合成和表征了4种以四溴代邻苯二甲酸根阴离子(4Br-PHTH)桥联、以1,10-菲咯啉(phen),5-硝基-1,10-菲咯啉(NO_2-phen),2,2′-联吡啶(bpy)和4,4′-二甲基-2,2′-联吡啶(Me_2bpy)端接的双核钴(Ⅱ)配合物[Co_2(4Br-PHTH)(L)_4](ClO_4)(L=phen(l),NO_2-phen(2),bpy(3),Me_2bpy(4))。基于IR光谱、元素分析、电导测量等方法推定配合物具有四溴代邻苯二甲酸根桥联结构和Co(Ⅱ)离子具有畸变的八面体配位环境。进行了配合物变温磁化率(75~300K)的测定,其数据已用从自旋哈密顿符导出的磁方程拟合,求得交换参数J=-0.87cm~(-1)(1),-0.84cm~(-1)(2),-0.82cm~(-1)(3),-0.85cm~(-1)(4),表明金属离子间有弱的反铁磁性自旋交换相互作用。
Four kinds of tetrabutyl phthalate anion (4Br-PHTH) bridged with 1,10-phenanthroline (phen), 5-nitro-1,10-phenanthroline -phen), 2,2’-dipyridyl (bpy) and 4,4’-dimethyl-2,2’-bipyridine (Me_2bpy) (L) _4] (ClO_4) (L = phen (l), NO_2-phen (2), bpy (3), Me_2bpy (4)). Based on the IR spectra, elemental analysis and conductometric measurements, the complex was assumed to have a tetrabromophthalic anhydride bridge and a distorted octahedron coordination environment for Co (Ⅱ) ions. The magnetic susceptibility (75 ~ 300K) of the complex was measured. The data were fitted by the magnetic equation derived from spin Hamiltonian, and the exchange parameter J = -0.87cm -1 was obtained (1) , -0.84cm -1, -2.82cm -1, -3.8cm -1, respectively, indicating weak antiferromagnetic properties between metal ions Spin exchange interaction.