摘要
本文选用两种结构相似的含N羧酸配体:3-(4,4’-联吡啶)丙酸(BPA)和对氨基苯甲酸(p-ABA),合成得到两个过渡金属配合物:[Ni(SO4)(H2O)3(BPA)]2·2(H3O)·6(H2O)(1)和[Cd(H2O)(p-ABA)2]·2(H2O)(2)。用X-射线单晶衍射方法测定了配合物的晶体结构。结果表明,配合物1中BPA配体的吡啶N原子和羧基原子都参与了配位,两个BPA同时与两个Ni(Ⅱ)离子配位,形成首尾相连的双核配合物;配合物2中p-ABA配体的两个配位基团氨基和羧基也都参与了配位,形成与配合物1相似的配合物结构单元,并进一步形成一维配位聚合链。两个配合物都通过氢键作用形成三维结构的超分子化合物。
In the present work, two carboxylic acid ligands containing N: 3- (4,4'- bipyridine) propionic acid (BPA) and para aminobenzoic acid (p-ABA) were synthesized and two transition metal complexes were ob- tained: [Ni(SO,)(H20)3(BPA)]2 "2(H30) "6(H20) (1) and[Cd(H20)( p-ABA)2] "2(H20) (2). The crystal structure of the complex shows that, both the pyridine N atom and the carboxyl groups of atoms on BPA ligand were involved in the coordination with Ni (II) ion and formation of binuclear complex with end to end fashions ( 1 ) ; on the other hand, similar coordination structural unit also can be obtained in the case of P- ABA ligand with Cd (II) ion (2), and the different is that a one-dimensional coordination polymer chain was formed in complex 2. Furthermore, supramolecular coordination based 3D structures were finally constructed in the two complexes by hydrogen bonding.
出处
《贵州大学学报(自然科学版)》
2015年第1期25-28,共4页
Journal of Guizhou University:Natural Sciences
基金
教育部春晖计划(Z142005)
贵州省自然科学基金(Z123058)