2,2′-二甲氧基-4,4′-联苯二甲酸铜配合物的合成、晶体结构及性质研究(英文)

Synthesis,Crystal Structure and Properties of a Copper(Ⅱ) Complex with 2,2′-Dimethoxy-4,4′-biphenyldicarboxylic Acid

以2,2′-二甲氧基-4,4′-联苯二甲酸(H2L)为配体,采用溶剂热法合成了1个二维结构的铜配合物[Cu4L4(H2O)9]·10H2O(1)。借助IR,TGA,粉末和单晶X-射线衍射对其进行了表征。单晶结构分析表明1属于正交晶系,Pnma空间群,晶胞参数a=1.493 9(3)nm,b=3.051 6(6)nm,c=1.569 4(3)nm。在1的结构中存在4个晶体学不同的四方锥构型铜离子,3个水分子桥连4个铜离子形成一条锯齿形短链,短链间以配体相连为二维层,层间通过分子间氢键形成了三维超分子结构。热重分析表明1在295℃开始发生分解。变温磁化率显示1的铜离子间存在弱的反铁磁性。

A copper（II） complex, [Cu4L4（H2O）9]·10H2O（1）, （H2L=2,2＇-dimethoxy-4,4＇-biphenyldicarboxylic acid）, was synthesized and characterized by FT-IR, TGA, powder and single crystal XRD. The complex crystallizes in orthorhombic system with space group Pnma, a=1.493 9（3） nm, b=3.051 6（6） nm, c=1.569 4（3） nm, V=7.154（2） nm3, Z=4 with final R=0.040 6. The complex contains four crystallographically distinct Cu（II） ions and each Cn（II） ions locates in a square-pyramid environment. Three p.2-bridging water molecules connect the four Cu（ii） ions to form a short zigzag chain which is further joined by the L ligands to generate a 2D layer. A lot of hydrogen bonds assemble the 2D layer into a 3D supramolecular structure. The TG analysis shows that the complex is stable below 295 ℃. Magnetic susceptibility measurement indicates that there is a weak antiferromagnetic exchange coupling between the Cu（II） ions. CCDC： 872818, 1.