Homochiral Coordination Polymers from Single Helices to Multiple Helices Controlled by Metal Ions  

作　　者：XU Zhong-Xuan HU Bang-Ping LI Li-Feng XU Shi-Fei 徐中轩;胡邦平;李立凤;徐仕菲(School of Chemistry and Chemical Engineering,Zunyi Normal College,Zunyi 563002,China)

机构地区：[1]School of Chemistry and Chemical Engineering,Zunyi Normal College,Zunyi 563002,China

出　　处：《Chinese Journal of Structural Chemistry》2021年第9期1131-1137,1107,共8页结构化学（英文）

基　　金：the National Natural Science Foundation of China(No.21761036)。

摘　　要：Helix as essential molecular chiral phenomenon at supramolecular level offers an affective method to study chiral characteristic of homochiral coordination polymers(CPs).Herein,two homochiral CPs[Cd((R)-CBA)_(2)(3,5-DIT)]_(n)((R)-H_(2) CBA=(R)-4-(1-carboxyethoxy)benzoic acid,3,5-DIT=3,5-di(1 H-imidazol-1-yl)toluene,1-R)and[Zn((R)-CBA)(3,5-DIT)]_(n)(2-R)were synthesized under hydrothermal conditions.In complex 1-R,only a helical chain was built by chiral ligands(R)-CBA2-,ancillary ligands 3,5-DIT and Cd(Ⅱ)ions.After Cd(Ⅱ)ions were replaced by Zn(Ⅱ)ions under similar reaction system,Zn(Ⅱ),(R)-CBA^(2-)and/or 3,5-DIT formed six types of helices,resulting in complex 2-R.So,the metal ions played a key role in the construction of helical structures.Complexes 1-R and 2-R were also characterized by elemental analysis,PXRD,TGA,CD and UV-visible absorptions.In addition,complexes 1-R and 2-R exhibited different photoluminescence behaviors in solid sate compared to free ligand(R)-H_(2)CBA.

关 键 词：homochiral coordination polymers helical chain metal ion effect supramolecular framework 

分 类 号：O641.4[理学—物理化学]