一维配位聚合物{[Co(dpa)(H_2O)_4]·(dpdo)·(H_2O)}_n(H_2dpa=2,2′-联苯二酸,dpdo=N,N′-二氧化-4,4′-联吡啶)的晶体结构和光谱性质(英文)

Crystal Structure and Spectral Properties of a One-Dimensional Coordination Polymer {[Co(dpa)(H_2O)_4].(dpdo).(H_2O)}_n (H_2dpa=2,2′-biphenyldicarboxylate, dpdo=4,4′-bipyridine-N,N′-dioxide)

采用水热合成法制备了一个一维配位聚合物{[Co(dpa)(H2O)4].(dpdo).(H2O)}n(1)(H2dpa=2,2′-联苯二酸,dpdo=N,N′-二氧化-4,4′-联吡啶),通过红外光谱、紫外光谱、元素分析、XRPD、TGA和X-射线单晶衍射进行了表征。Co(Ⅱ)原子采取了畸变的八面体构型,6个配位氧原子分别来自于2个dpa2-配体和4个配位水分子。每一个dpa2-配体桥联2个Co髤中心,每一个Co(Ⅱ)原子与2个dpa2-配体配位进而形成了21螺旋链结构。借助溶剂水分子的连接作用,螺旋链之间通过多种O-H…O氢键作用形成了2D网格,通过dpdo和2D网格之间多种类型的氢键作用形成了三维超分子结构。测定了室温下聚合物1的固体荧光光谱。

A new Co（H） coordination polymer {[Co（dpa）（H20）4]＂ （dpdo）＂ （H20）}, （1） （Hzdpa=2,2＇-biphenyldicarboxy- late, dpdo=4,4＇-bipyridine-N,N＇-dioxide） has been synthesized and characterized by IR spectroscopy, UV-Vis spectroscopy, elemental analysis, XRPD, TGA and X-ray single-crystal structure analysis. The Co（lI） atom has a distorted oetahedral coordination environment with a set of oxygen donors from two dpa2- ligands and four coordinated water molecules. Each dpa2- ligand is bounded to two cobalt centers and each cobalt atom is coordinated by two dpaz- ligands thereby generating a 21 helical chain. The helical chains further interact with each other and form a 2D network through multiform O-H...O hydrogen bonds with the help of the solvent water. In the solid state the adjacent layers are separated by dpdo units to form a 3D framework. Upon the excitation at 275 nm, the polymer 1 shows one emission peak at 430 nm in the solid state. CCDC： 922034.