基于柠康酸构筑的三个配合物的合成、结构与性能（英文）

Syntheses, Structures and Properties of Three Coordination Polymers Based on Citraconic Acid

在水热条件下,制备出3个配位聚合物,即{[Zn(ca)(iimb)]·0.75H2O}n(1),{[Cd(ca)(iimb)(H2O)]·0.75H2O}n(2)和{[Zn(ca)(bpe)0.5(H2O)]·H2O}n(3)(H2ca=柠康酸,iimb=1-(1-咪唑基)-4-(咪唑基-1′-甲基)苯,bpe=1,2-二(4-吡啶基)乙烯),并通过单晶X射线衍射、红外光谱和元素分析进行结构表征。配合物1是含有一维金属羧酸链的二维网状层。2是具有羧酸桥连双核的一维准梯形链状结构。3是二维波浪层。其中2和3的三维超分子结构由丰富的氢键相互作用形成;而1的三维超分子结构通过范德华力堆积而成。研究了3个配合物的热重分析(TGA),粉末X射线衍射(PXRD)和荧光性质。固态荧光光谱表明3个配合物的发射光谱与相应的辅助配体相似。此外,配合物3在紫外光照射下,在H2O2存在时对亚甲基蓝(MB)的降解表现出良好的光催化活性。

Three coordination polymers,{[Zn(ca)(iimb)]·0.75H2O}n(1),{[Cd(ca)(iimb)(H2O)]·0.75H2O}n(2)and{[Zn(ca)(bpe)0.5(H2O)]·H2O}n(3)(H2ca=citraconic acid,iimb=1-(1-imidazolyl)-4-(imidazol-1-ylmethyl)benzene,bpe=1,2-di(4-pyridyl)ethylene),were synthesized hydrothermally and measured structurally by single crystal X-ray diffraction,infrared spectroscopy(IR)and elemental analysis.Complex 1 displays a 2D reticular layer containing 1D metal-carboxylate chains.2 features a 1D quasi-trapezoidal shape chain structure containing carboxylate-bridged dinuclear structures.Complex 3 shows a two-dimensional wave layer.The three-dimensional supramolecular structures of 2 and 3 are formed by abundant H-bond interactions;nevertheless,3D supramolecular structure of 1 is formed through weak van der Waals force.Thermogravimetric analyses(TGA),powder X-ray diffractions(PXRD)and fluorescence properties for complexes 1~3 were investigated.The solid state fluorescence spectra indicate that all emission spectra of three complexes 1~3 are similar with those of the corresponding auxiliary ligands.In addition,complex 3 exhibits good photocatalytic activity for methylene blue(MB)degradation in the presence of H2O2 under UV irradiation.CCDC:1913976,1;1913977,2;1913978,3.