一维链状铜配位聚合物的合成、晶体结构与热稳定性研究

Synthesis,Crystal Structure and Thermal Stability of 1D Copper(Ⅱ) Coordination Polymer

本文合成了1个新的一维配位聚合物[Cu(apy)(sal)2]n(apy=2-氨基嘧啶,sal=水杨醛),并对其进行了元素分析、红外、热重、紫外、核磁、粉末XRD及单晶X-射线衍射表征。该聚合物为三斜晶系,空间群P1,a=0.726 87(15)nm,b=0.914 41(18)nm,c=1.382 0(3)nm,α=108.74(3)°,β=94.13(3)°,γ=96.64(3)°,V=0.858 2(3)nm 3,Z=2,R=0.087 8。Cu(Ⅱ)离子分别与来自2个不同水杨醛配体中的4个氧原子以及2个不同2-氨基嘧啶配体中的2个氮原子配位,形成了1个八面体配位构型。2-氨基嘧啶配体桥联相邻的Cu(Ⅱ)离子形成了沿bc平面的一维折叠链状结构,其相邻Cu(Ⅱ)离子之间的距离为0.6954 nm。此外,相邻的链中水杨醛的芳环之间存在着π-π堆积作用,该芳环堆积作用使得配合物构筑成二维超分子层状结构。

A 1D coordination polymer of [Cu（apy）（sal）2]n （apy=2-aminopyrimidine, sal=salicylaldehyde） has been synthesized and characterized by elemental analysis, IR, TG, UV, NMR, powder and X-ray single crystal diffraction. The title complex crystallized in triclinic system with space group P1, a=0.726 87（15） nm, b=0.91441（18） nm, c= 1.382 0（3） nm, ot=108.74（3）°,β=94.13（3）°, γ=96.64（3）° and V=0.858 2（3） nm 3, Z=2, R=0.087 8. Each Cu（lI） atom is sixoordinated by four 0 atoms from two different sal ligands and two N atoms from two different apy ligands, thus defining an octahedron coordination geometry. Adjacent Cu（Ⅱ） atoms are bridged by the apy ligands to construct a 1D zig-zag chain structure along the diagonal of bc plane with the closest Cu ... Cu distance being 0.695 4 nm. Furthermore, such chains are further linked by π--π stacking interactions between the benzene rings of adjacent sal ligands into a 2D （4,4） layer structure. CCDC： 791023.