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在水热条件下,选用间苯二乙酸,4,4′-二(咪唑基-1-亚甲基)联苯两种柔性配体和钴(II)盐反应制备了一种新型的配位聚合物[Co_2(mpda)(Hmpda)_2(bibp)_2]·H_2O[H_2mpda=间苯二乙酸,bibp=4,4′-二(咪唑基-1-亚甲基)联苯]。利用红外光谱、C H N元素分析、热重分析以及单晶X射线衍射和X射线粉末衍射等方法对配合物的晶体结构进行了表征。配合物属三斜晶系,空间群为Pī,晶体学参数:a=12.3569(7)nm,b=16.5347(9)nm,c=17.0455(9)nm;α=100.8830(10)°,β=103.8340(10)°,γ=109.4360(10)°,V=3048.9(3)nm~3,Z=2。此配合物中,Hmpda-连接{[Co_2(bibp)2][Co_2(mpda)_2][Co_2(bibp)_2]}连环结构单元,形成一维聚合带;基于失去一个H+的间苯二乙酸和[Co_2(mpda)_2]环中失去两个H~+的间苯二乙酸之间的氢键,配合物得以扩展为二维网状超分子结构。同时,由于一维环带状聚合基序的存在,形成了聚轮烷和聚索烃两种结构,这两种结构交错共存构成复杂网络结构。
Under hydrothermal conditions, a novel coordination complex was prepared by the reaction of two kinds of flexible ligands, 4,4’-bis (imidazolyl-1-methylene) biphenyl and isobalt (II) Polymer [Co_2 (mpda) (Hmpda) _2 (bibp) _2] · H_2O [H_2mpda = isophthalacetic acid, bibp = 4,4’-bis (imidazolyl-1 -methylene) biphenyl]. The crystal structure of the complex was characterized by infrared spectroscopy, elemental analysis of C H N, thermogravimetric analysis, single crystal X-ray diffraction and X-ray powder diffraction. The complex belongs to the triclinic system with space group Pī. The crystallographic parameters are as follows: a = 12.3569 (7) nm, b = 16.5347 (9) nm, c = 17.0455 = 103.8340 (10) °, γ = 109.4360 (10) °, V = 3048.9 (3) nm ~ 3, Z = 2. In this complex, Hmpda- links the structural unit of {Co_2 (bibp) 2] [Co_2 (mpda) _2] [Co_2 (bibp) _2]} to form a one-dimensional polymerization zone. Based on the loss of one H + And [Co_2 (mpda) _2] ring lose two H ~ + isophthalamic acid hydrogen bonds between the complexes can be extended to two-dimensional network of supramolecular structure. At the same time, due to the existence of one-dimensional ring-shaped polymerization motifs, two structures of polyrotaxane and poly-hydrocarbon are formed, and the two structures coexist to form a complex network structure.