基于5-(4-(2,6-二(2-吡啶基)-4-吡啶基)苯氧基)间苯二甲酸的Ni(Ⅱ)和Cd(Ⅱ)配位聚合物的合成与晶体结构

Syntheses and Crystal Structures of Ni(Ⅱ) and Cd(Ⅱ) Coordination Polymers Based on 5-(4-(2,6-Di(pyrizin-2-yl)pyridin-4-yl)phenoxy)isophthalic Acid

用溶剂热法合成了2个以5-(4-(2,6-二(2-吡啶基)-4-吡啶基)苯氧基)间苯二甲酸(H_2L)为配体的金属-有机配位聚合物:{[NiL(H_2O)]·H_2O}_n(1),[Cd L(phen)]_n(2)。通过X-射线单晶衍射,元素分析和红外光谱进行了结构表征。结构分析表明,在1中,L^(2-)配体的2个羧基氧原子桥连相邻的2个Ni(Ⅱ)离子,形成平行于a轴的一维链,链间则通过吡啶氮原子与金属离子连接,最终形成具有(4,4)-连接三维网络结构。在2中,Cd(Ⅱ)为七配位的单帽三棱柱几何构型,L2-配体通过2个羧基和1个吡啶基与3个中心金属Cd(Ⅱ)相连,形成(3,3)-连接的二维层面结构,又通过面间的π…π堆积作用形成了3D超分子结构。测定了配位聚合物的热稳定性和2的荧光性质。

Two new metal-organic coordination polymers {[NiL（H2O）]·H2O}n（1）, [CdL（phen）]n（2）（H2L=5-（4-（2,6-di（pyrizin-2-yl）pyridin-4-yl）phenoxy）isophthalic acid） have been synthesized under solvothermal conditions and characterized by single crystal X-ray diffraction analysis. Complex 1 features a（4,4）-connected 3D network. The carboxylate groups of the L2-ligands bridges two Ni （Ⅱ） ions into one 1D chain, then the neighboring chains are further interconnected by the N atoms of the L2- ligands to generate a 3D net. Complex 2 displays a（3,3）-connected 2D framework and further linked by π…π interactions between aromatic rings with a centroid-centroid distance of 0.365 2 nm into the final 3D net, in which the Cd （Ⅱ） is seven-coordinated in one-capped trigonol prismatic geometry. Thermogravimetric analyses（TGA） have been measured for 1 and 2. Luminescent properties of 2 were investigated. CCDC： 1406238, 1; 1406239, 2.