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在水热条件下利用间苯二乙酸、2,2′-二联吡啶和硝酸镉反应得到一种新型配合物{[Cd2(pda)2(2,2′-bipy)2]·2H2O}n(1)(1,3-pda=间苯二乙酸、2,2′-bipy=2,2′-二联吡啶)。采用红外光谱、差热-热重、CHN元素分析、荧光及单晶X射线衍射等手段对晶体结构进行了表征。配合物属三斜晶系,空间群为P1;晶体学参数:a=10.902(2)A,b=11.047(2)A,c=15.799(2)A;α=91.546(2)°,β=90.233(2)°,γ=94.030(2)。其基本结构单元由两个Cd(II)原子、四个间苯二乙酸根、两个2,2′-二联吡啶组成。间苯二乙酸与Cd(Ⅱ)原子交替连接形成城墙垛型一维链,相邻的链间通过π-π堆积作用形成二维超分子结构。另外,配合物在393nm处呈现较强的荧光发射(λex=322nm)。
A novel complex {[Cd2 (pda) 2 (2,2’-bipy) 2] · 2H2O} n was obtained by the reaction of 2,2’-bipyridine and cadmium nitrate with isophthalacetic acid under hydrothermal conditions (1) (1,3-pda = isophthalamic acid, 2,2’-bipy = 2,2’-bipyridine). The crystal structure was characterized by FTIR, TG-DTA, CHN elemental analysis, fluorescence and single crystal X-ray diffraction. The complex belongs to the triclinic system with space group P1. The crystallographic parameters are: a = 10.902 (2) A, b = 11.047 (2) A, c = 15.799 (2) A; = 90.233 (2) °, γ = 94.030 (2). Its basic building block consists of two Cd (II) atoms, four isophthalazoles and two 2,2’-bipyridines. Isophenylacetic acid and Cd (Ⅱ) atoms are alternately connected to form a city wall stack type one-dimensional chain. The adjacent chains form a two-dimensional supramolecular structure through π-π stacking. In addition, the complex showed strong fluorescence emission at 393 nm (λex = 322 nm).