链状螺旋配位聚合物[Zn(BBP)(p-CPOA)]_n的合成及表征(英文)  

Synthesis and Characterization of Coordinated Polymer [Zn(BBP)(p-CPOA)]_n with One-dimensional Helical Chain

作　　者：杨燕[1] 曾明华[2] 张淑华[2] 梁宏[1] 

机构地区：[1]中南大学化学化工学院 [2]广西师范大学化学化工学院,桂林541004

出　　处：《无机化学学报》2007年第8期1435-1438,共4页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.30460153,20561001);广西自然科学基金(No.0447019)资助项目。

摘　　要：A coordination polymer of [Zn(BBP)(p-CPOA)]n (where BBP is 2,6-bis(benzimidazolyl)pyridine and p-CPOA is p-carboxylato-phenoxyacetate dianion) has been synthesized and characterized by elemental analysis,IR,TG,and the single crystal structure was determined by X-ray diffraction. The crystal crystallizes in the monoclinic system,space group of P21/n with a=1.397 3(4) nm,b=1.138 4(3) nm,c=1.575 9(5) nm,β=91.805(1)°,V=2.505 4(13) nm3,Z=4,Dc=1.513 g·cm-3,μ=1.030 mm-1 and F(000)=1 168. Zn(Ⅱ) ion is penta-coordinated and surrounded by two carboxylate O atoms from two different p-CPOA groups in a bis-monodentate mode,three N atoms from the 2,6-bis(benzimidazolyl)pyridine ligand,completing a distorted trigonal bipyramidal coordination configuration. The structure is a helix with a long pitch of 1.138 4 nm. Under direction of supramolecular recognition and attraction,the adjacent chains are formed the double-stranded chain through π-π stacking between the 2,6-bis(benzimidazolyl)pyridine ligands and hydrogen-bonding interactions. A three-dimensional supramolecular network is further constructed through these interactions between the helices. The TG shows that its chain skeleton is thermally stable up to 382 ℃.A coordination polymer of [Zn（BBP）（p-CPOA）]n （where BBP is 2,6-bis（benzimidazolyl）pyridine and p-CPOA is p-carboxylato-phenoxyacetate dianion） has been synthesized and characterized by elemental analysis,IR,TG,and the single crystal structure was determined by X-ray diffraction. The crystal crystallizes in the monoclinic system,space group of P21/n with a=1.397 3（4） nm,b=1.138 4（3） nm,c=1.575 9（5） nm,β=91.805（1）°,V=2.505 4（13） nm3,Z=4,Dc=1.513 g·cm-3,μ=1.030 mm-1 and F（000）=1 168. Zn（Ⅱ） ion is penta-coordinated and surrounded by two carboxylate O atoms from two different p-CPOA groups in a bis-monodentate mode,three N atoms from the 2,6-bis（benzimidazolyl）pyridine ligand,completing a distorted trigonal bipyramidal coordination configuration. The structure is a helix with a long pitch of 1.138 4 nm. Under direction of supramolecular recognition and attraction,the adjacent chains are formed the double-stranded chain through π-π stacking between the 2,6-bis（benzimidazolyl）pyridine ligands and hydrogen-bonding interactions. A three-dimensional supramolecular network is further constructed through these interactions between the helices. The TG shows that its chain skeleton is thermally stable up to 382 ℃.CCDC： 626650.

关 键 词：锌配合物 螺旋结构 Π-Π堆积 氢键 

分 类 号：O614.241[理学—无机化学]