草酸根缓释法制备草酸配位聚合物晶体

摘要

N ，N′-二（乙二酰基苯基）草酰胺在碱性溶液中于室温下水解，缓慢生成草酸根离子，并与溶液中的 Cd2＋配位形成配位聚合物｛[Cd（C2 O4）（H2 O）2]·H2 O｝n 的单晶。X-射线单晶结构分析表明，在配位聚合物中，草酸根作为桥联配体与 Cd（Ⅱ）配位，构成的二维网络结构通过氢键连接形成三维超分子结构，结构中的孔穴被客体水分子所占据。提供了一种在温和条件下缓慢释放草酸根离子，便于其与金属离子结合得到结晶性能良好的配位聚合物晶体的新方法，避免了由草酸盐合成配位聚合物因反应速度过快而得不到良好晶体的问题。%Based on the hydrolysis of 1,1′-oxalylbisisatin in alkaline solution at room temperature,oxalate i-ons were slowly released and then coordinated to Cd2+ to form crystals of the coordination polymer {[Cd(C2 O4 ) (H2 O)2 ]·H2 O}n .X-ray single crystal analysis revealed that the oxalate ions acted as bridging ligands to link the Cd(Ⅱ)into 2D networks in the coordination polymer.Hydrogen bonds connected the 2D layers into a 3D supramolecular network.This work provided a new approach to release oxalate ions in solution under mild con-dition,which was convenient for the oxalate ligand to combine with metal ions to form crystals of coordination polymer with high quality,and avoided the problem of couldn′t get good crystal form because of the fast reac-tion speed when using oxalate to synthesize coordination polymer.