Unique T-Shaped Ligand as a New Platform for Metal-Organic Frameworks
Unique T-Shaped Ligand as a New Platform for Metal-Organic Frameworks
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独特的 T 形配体作为金属有机框架的新平台
DOI：
10.1021/acs.cgd.8b01528
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发表时间：
2019-01-01
影响因子：
3.8
通讯作者：
Li, Jian-Rong
中科院分区：
文献类型：
--
作者：
He, Tao;Zhang, Yong-Zheng;Li, Jian-Rong
设计了一种T型配体4，4 '，4 "-（1H-苯并[d]咪唑-2，4，7-三基）三苯甲酸（H（3）BTBA），并以此为平台构建了结构多样性的金属有机骨架（MOFs）.五种新的MOFs，[Zn4O（BTBA）（2）]（BUT-34）、[Fe2CoO（BTBA）（2）（H2O）（3）]（BUT-35）、[Cu-9（BTBA）（4）（H2O）-（DMA）]（BUT-36）、[Eu-2（HBTBA）（2）（OH）（2）（H2O）（6）]（BUT-37）和[In（BTBA）（DMF）]（BUT-38）（BUT =北京工业大学），已经溶剂热合成和结构表征。结合几种常用的金属簇二级结构单元，这五种MOFs显示出新颖的结构特征。BUT-34具有典型的四核Zn_4O簇合物结构，具有新的（3，6）-连接拓扑结构. BUT-35具有（3，6）-连接的三核[Fe_2Co（mu（3）-O）]簇合物结构。BUT-36是一个混合的Cu（II）/Cu（I）三维骨架，其中T型配体采用不同的配位模式。BUT-37和BUT-38分别由双核Eu-2桨轮团簇和单个In（III）离子组成，具有二维层状结构。显然，这些MOFs的结构多样性可以归因于T形配体的独特结构和可变配位模式。这一工作丰富了基于低对称配体的结构设计和功能探索。
The utilization of a rationally designed T-shaped ligand 4,4',4 ''-(1H-benzo[d]imidazole-2,4,7-triyl)tribenzoic acid (H(3)BTBA) as the platform for constructing metal-organic frameworks (MOFs) with structure diversity was achieved. Five new MOFs, [Zn4O(BTBA)(2)] (BUT-34), [Fe2CoO(BTBA)(2)(H2O)(3)] (BUT-35), [Cu-9(BTBA)(4)(H2O)-(DMA)] (BUT-36), [Eu-2(HBTBA)(2)(OH)(2)(H2O)(6)] (BUT-37), and [In(BTBA)(DMF)] (BUT-38) (BUT = Beijing University of Technology), have been solvothermally synthesized and structurally characterized. Combining with several popularly used metal-cluster secondary building units, the five MOFs show novel structural features. BUT-34 with typical tetranuclear Zn4O clusters shows three-dimensional (3D) networks with a new (3,6)-connected topology. BUT-35 exhibits a (3,6)-connected flu-3 network with trinuclear [Fe2Co(mu(3)-O)] clusters. BUT-36 represents a mixed Cu(II)/Cu(I) based 3D framework, in which the T-shaped ligand adopts different coordination modes. However, BUT-37 and -38 consist of binuclear Eu-2 paddle-wheel clusters and single In(III) ions with two-dimensional layer structures, respectively. Clearly, the structural diversity of these MOFs can be attributed to the unique structure and variable coordination patterns of the T-shaped ligand. This work thus enriches the in the structural design based on the low-symmetric ligands, and thereby function exploration.