| 2，2'-二甲基-4，4'-联苯二甲酸构筑的两个金属有机骨架 | |
| Two Metal-Organic Frameworks Built from 2,2'-Dimethyl-4,4'-biphenyldicarboxylic Acid | |
| 摘要: 以2，2'-二甲基-4，4'-联苯二甲酸（H2L）为配体，采用溶剂热法合成了2个金属有机骨架：[Ni（μ2-H2O）（L）（DMF）（H2O）]·0.5H2O（1）和[Cd2.5（L）（trz）3（H2O）2]·2.5DMF（2）（DMF=N，N-二甲基甲酰胺，Htrz=1，2，4-三氮唑）。借助红外、热重、粉末和单晶X射线衍射对其进行了表征。单晶结构分析表明，1结晶于单斜晶系的P21/c空间群，镍离子处在拉长的[NiO6]八面体中且分别被μ2-H2O和L2-配体连接形成二维sql拓扑网络。2结晶于单斜晶系，C2/m空间群，含有3个不同的镉离子且均为扭曲的八面体构型。3个镉离子被三氮唑负离子以μ1，2，4-桥连，在ab平面形成二维的kgd层，这些层再被L2-配体沿c轴支撑形成（4，8）双节点的三维flu拓扑网络。热重分析表明，1和2的网络分别在390和230℃发生分解。 | |
| 关键词: 金属有机骨架 2，2'-二甲基-4，4'-联苯二甲酸 晶体结构 拓扑 | |
| 基金项目: 江苏省自然科学基金（No.BK20181374）和江苏省研究生科研与实践创新计划（No.KYCX20_1027）资助。 | |
| Abstract: Two metal-organic frameworks (MOFs),[Ni(μ2-H2O)(L)(DMF)(H2O)]·0.5H2O (1) and[Cd2.5(L)(trz)3(H2O)2]·2.5DMF (2) (L=2,2'-dimethyl-4,4'-biphenyldicarboxylic acid, DMF=N,N-dimethylformamide, Htrz=1,2,4-triazole), have been synthesized and characterized by FT-IR, thermogravimetric analysis (TGA), powder and single crystal X-ray diffraction. MOF 1 crystallizes in monoclinic system with a space group P21/c. Ni(Ⅱ) ion adopts an elongated[NiO6] octahedron as a 4-connected node and is linked by μ2-H2O and L2- ligands to generate a 2D sql topological network. MOF 2 crystallizes in monoclinic system with a space group C2/m and contains three crystallographically different Cd(Ⅱ) ions. Each Cd(Ⅱ) ion shows a distorted octahedral geometry and three Cd(Ⅱ) ions are connected by trz- co-ligands in a μ1,2,4-bridging mode to form a 2D kgd layer with (3,6) topology in the ab plane. These layers are further pillared by the L2- ligands along the c axis to produce a binodal (4,8)-connected 3D flu framework. The TGA showed that 1 and 2 were stable below 390 and 230℃, respectively. | |
| Keywords: metal-organic frameworks 2,2'-dimethyl-4,4'-biphenyldicarboxylic acid crystal structure topology | |
| 投稿时间：2020-12-06 修订日期：2020-12-24 | |
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| 何鑫,张顺林,肖天宇,朱敦如.2，2'-二甲基-4，4'-联苯二甲酸构筑的两个金属有机骨架[J].无机化学学报,2021,37(5):945-952. | |
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