论文部分内容阅读
合成了一个配位聚合物{[Cd(pdc)(bbi)]·2H2O}n(H2pdc=2,3-吡啶二甲酸,bbi=1,4-二咪唑基丁烷),利用元素分析、红外光谱和X-射线单晶衍射考察了配合物的结构。配合物中,Cd(Ⅱ)的配位数为5,每个Cd(Ⅱ)与1个吡啶二甲酸离子的1个羧基氧原子和吡啶氮原子,另1个吡啶二甲酸离子的1个羧基氧原子,以及2个1,4-二咪唑基丁烷的2个氮原子配位。吡啶二甲酸离子的配位方式可以表示为μ-(κ3N,O2∶O3),Cd(Ⅱ)与之连接形成一维骨架链[Cd(pdc)]∞。配体1,4-二咪唑基丁烷采用了“Ω”和“S”两种构型,它们进一步与中心原子配位形成三维网络结构。配合物为三重穿插的金刚石型网络结构,拓扑学符号为66。受光激发,该配合物在426 nm处有一个发射峰。
A coordination polymer {[Cd (pdc) (bbi)] · 2H2O} n (H2pdc = 2,3-pyridinedicarboxylic acid and bbi = 1,4-diimidazolylbutane) was synthesized and characterized by elemental analysis, Spectra and X-ray single crystal diffraction were investigated for the structure of the complex. In the complex, the coordination number of Cd (Ⅱ) is 5, one carboxyl oxygen atom and one pyridine nitrogen atom of each Cd (Ⅱ) and one pyridinedicarboxylate ion and one carboxyl group of the other pyridinedicarboxylate ion Oxygen atom, and two nitrogen atoms of two 1,4-diimidazolyl butane. The complexation of pyridinedicarboxylate ions can be expressed as μ- (κ3N, O2: O3), and Cd (Ⅱ) is linked with it to form a one-dimensional framework chain [Cd (pdc)] ∞. The ligand 1,4-diimidazolyl butane adopts two configurations of “Ω” and “S”, which further coordinate with the central atom to form a three-dimensional network structure. The complex is a triple-interspersed diamond network structure with a topology symbol of 66. Upon excitation by light, the complex has an emission peak at 426 nm.