N-苯胺叉二乙酸根与4,4′-联吡啶构筑的一维梯状铜(Ⅱ)配位聚合物的合成、结构与磁性

Synthesis,Structure and Magnetic Property of a New 1D Ladder-Like Copper(Ⅱ) Coordination Polymer Constructed from Phenyliminodiacetate and 4,4′-Bipyridyl

以Cu(ClO4)2,H2L(N-苯胺叉二乙酸)和4,4′-bpy(4,4′-联吡啶)为原料,采用溶剂挥发的方法得到了1个新的一维梯状配位聚合物{[Cu2L2(H2O)(4,4′-bpy)].DMF.3H2O}n(1)。通过元素分析、红外光谱、热重分析和单晶X-射线衍射法对其组成和结构进行了表征。在配合物1中,每个N-苯胺叉二乙酸根离子(L2-)分别桥联2个铜(Ⅱ)离子形成一维锯齿形链状结构,一维链通过4,4′-联吡啶(4,4′-bpy)的2个氮原子连接形成一维梯状结构。配合物1的变温磁化率实验测试结果表明在相邻的铜离子间存在弱的反铁磁相互作用。

A new 1D ladder-like coordination ploymer of {[Cu2L2（H20）（4,4＇-bpy）]· DMF· 3H2O}n （1） was synthesized with Cu（ClO4）2, H2L （phenyliminodiacetic acid, C6H5N（CH2COOH）2） and 4,4＇-bpy （4,4＇-bipyridyl） by slow evaporation at room temperature. The composition and structure of complex 1 were characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis and X-ray crystallography. The result of single-crystal X-ray diffraction analysis reveals that 1 crystallizes in the triclinic crystal system with P1 space group, a=0.873 65（16） nm, b=0.991 32（18） nm, c=2.179 6（4） nm, α=100.848（3）°, β=100.694（3）°, γ=91-023（3）°, V=1.819 0（6） nm3, Z=2, Dc=1.539 g·cm^-3, F（000）=872, R1=0.065 6, wR2=0.184 8 （I〉2σ（I））. In complex 1, the interconnection of Cu（Ⅱ） ions by chelating and bridging of L2- anions result in a 1D zigzag chain structure of [CuzLz（H2O）]n. The two adjacent 1D zigzag chains are further linked by 4,4＇-bpy ligands to form a 1D ladder-like structure of [Cu2La（H2O）（4,4＇-bpy）],. Magnetic susceptibility measurement of complex 1 indicates the presence of weak antiferromagnetic interactions between the neighboring Cu（II） ions. CCDC： 871729.