A series of metal-organic frameworks containing diverse secondary building units derived from a flexible triazine-based tetracarboxylic ligand
A series of metal-organic frameworks containing diverse secondary building units derived from a flexible triazine-based tetracarboxylic ligand
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一系列金属有机框架，含有源自灵活的三嗪基四羧酸配体的多种二级结构单元
DOI：
10.1039/c3ce42045k
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发表时间：
2014
期刊：
影响因子：
3.1
通讯作者：
Wu Xintao
中科院分区：
文献类型：
--
作者：
Li Jie;Sheng Tianlu;Bai Songyan;Hu Shengmin;Wen Yuehong;Fu Ruibiao;Huang Yihui;Xue Zhenzhen;Wu Xintao
五个新的配位聚合物，{[Zn 2（CCTA）（DMF）2]·（DMF）·（H2O）2} n（1），{[Zn 2.5（CCTA）（OH）（H2O）]·（DMF）·（H2O）} n（2），{[Zn 2（CCTA）（H2O）3]·（NMP）2·（H2O）3} n（3），{[Cd 4（CCTA）2（DMF）4（H2O）2]·（H2O）6} n（4）和{[Cd 4（CCTA）2（H2O）4]·（H2O）4} n（5），（H4CCTA = 2，4-双（4-羧基苯胺基）-6-双（羧甲基）氨基-1，3，5-三嗪，DMF = N，N ′-二甲基甲酰胺，NMP = N-甲基-2-吡咯烷酮），含有不同的二级结构单元（SBU）。由于柔性H4CCTA配体的不同配位模式和不同构象，这五种配合物表现出不同的拓扑结构。配合物1是由四核锌簇构成的（4，4）-sql拓扑结构的二维（2D）结构。配合物2也具有一个二维的框架，具有一个前所未有的（418·610）（45·6）2点符号基于五核锌簇。配合物3是一个具有PtS拓扑结构的三维（3D）结构，含有线性的四核锌簇。配合物4和配合物5具有三维结构，分别由罕见的无限Cd-O-Cd和Cd2O2棒状SBU构建。此外，配合物4可以被描述为一个4-连通的单节点umc网络，而不是配合物5的柱层结构。
Five new coordination polymers, {[Zn2(CCTA)(DMF)2]·(DMF)·(H2O)2}n (1), {[Zn2.5(CCTA)(OH)(H2O)]·(DMF)·(H2O)}n (2), {[Zn2(CCTA)(H2O)3]·(NMP)2·(H2O)3}n (3), {[Cd4(CCTA)2(DMF)4(H2O)2]·(H2O)6}n (4) and {[Cd4(CCTA)2(H2O)4]·(H2O)4}n (5), (H4CCTA = 2,4-bis(4-carboxyphenylamino)-6-bis(carboxymethyl)amino-1,3,5-triazine, DMF = N,N′-dimethylformamide, NMP = N-methyl-2-pyrrolidone), have been solvothermally synthesized and contain diverse secondary building units (SBUs). Due to various coordination modes and different conformations of the flexible H4CCTA ligand, the five complexes exhibit different topologies. Complex 1 has a two-dimensional (2D) structure with (4,4)-sql topology constructed with tetranuclear zinc clusters. Complex 2 also possesses a 2D framework with an unprecedented (418·610)(45·6)2 point symbol based on pentanuclear zinc clusters. Complex 3 shows a three-dimensional (3D) framework with PtS topology, containing linear tetranuclear zinc clusters. Both complexes 4 and 5 with 3D frameworks are built with rare infinite Cd–O–Cd and Cd2O2 rod-shaped SBUs, respectively. Furthermore, complex 4 could be described as a 4-connected uninodal umc net, instead of the pillared-layer structure of complex 5.