Chen Kuan-Ting, Hu Ji-Hong, Yang Xiang-Kai, Chen Jhy-Der
Department of Chemistry, Chung-Yuan Christian University, Taoyuan City 320, Taiwan.
Polymers (Basel). 2020 Jun 3;12(6):1281. doi: 10.3390/polym12061281.
A series of Co(II), Ni(II) and Cu(II) coordination polymers and dinuclear metallocycles containing 4-aminopyridine (4-ampy) and benzenedicarboxylate ligands, {[M(4-ampy)(1,4-BDC)]·HO·CHCHOH} (M = Ni, ; Co, , 1,4-HBDC = benzene-1,4-dicarboxylic acid), {[Ni(4-ampy)(1,3-BDC)]·HO·CHCHOH} (1,3-HBDC = benzene-1,3-dicarboxylic acid), , [M(4-ampy)(1,2-BDC)] (M = Ni, ; Co, , 1,2-HBDC = benzene-1,2-dicarboxylic acid), [Co(4-ampy)(1,3-BDC)] , {[Cu(4-ampy)(1,4-BDC)] CHCHOH}, , and {[Cu(4-ampy)(1,4-BDC)]·HO}, ·HO, are reported, which were hydrothermally prepared and structurally characterized by using single crystal X-ray diffraction. Complexes and are isomorphous 1D zigzag chains, while displays a concave-convex chain and and are dinuclear metallocycles that differ in the boding modes of the 1,2-BDC ligands, forming a 3D and a 2D supramolecular structures with the and topologies, respectively. Complex exhibit a 1D helical chain and complexes and ·HO are 1D linear and zigzag chains, in which the Cu-1,4-BDC units adopt the and configurations, respectively. A novel irreversible structural transformation due to → isomerization of the Cu-1,4-BDC units was observed in ⋅HO and upon water adsorption of the desolvated product of ·HO.
报道了一系列含有4-氨基吡啶（4-ampy）和苯二甲酸酯配体的Co（II）、Ni（II）和Cu（II）配位聚合物及双核金属环，{[M(4-ampy)(1,4-BDC)]·HO·CHCHOH}（M = Ni， ；Co， ，1,4-HBDC = 苯-1,4-二甲酸），{[Ni(4-ampy)(1,3-BDC)]·HO·CHCHOH}（1,3-HBDC = 苯-1,3-二甲酸）， ，[M(4-ampy)(1,2-BDC)]（M = Ni， ；Co， ，1,2-HBDC = 苯-1,2-二甲酸），[Co(4-ampy)(1,3-BDC)] ，{[Cu(4-ampy)(1,4-BDC)] CHCHOH}， ，以及{[Cu(4-ampy)(1,4-BDC)]·HO}，·HO，这些是通过水热法制备并使用单晶X射线衍射进行结构表征的。配合物 和 是同构的一维锯齿链，而 呈现出凹凸链， 和 是双核金属环，它们在1,2-BDC配体的键合模式上有所不同，分别形成具有 和 拓扑结构的三维和二维超分子结构。配合物 呈现一维螺旋链，配合物 和·HO是一维线性和锯齿链，其中Cu-1,4-BDC单元分别采用 和 构型。在·HO的去溶剂化产物吸水后，在·HO和 中观察到由于Cu-1,4-BDC单元的 →异构化导致的新型不可逆结构转变。
