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Structural Diversity and Sensing Properties of Metal–Organic Frameworks with Multicarboxylate and 1H-Imidazol-4-yl-Containing Ligands
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2018-01-16 00:00:00 , DOI: 10.1021/acs.cgd.7b01572
Zhi-Qiang Liu 1, 2 , Kai Chen 1 , Yue Zhao 1 , Yan-Shang Kang 1 , Xiao-Hui Liu 1 , Qing-Yi Lu 1 , Mohammad Azam 3 , Saud I. Al-Resayes 3 , Wei-Yin Sun 1
Affiliation  

Two 1H-imidazol-4-yl-containing ligands 1,3-di(1H-imidazol-4-yl)benzene (L1) and 4,4′-di(1H-imidazol-4-yl)biphenyl (L2) were employed to react with corresponding metal salt together with varied carboxylate ligands under hydro- and solvothermal conditions, and six new metal–organic frameworks (MOFs) [Cd(L1)(oba)]·DMF (1), [Ni3(L1)2(BPT)2(H2O)4] (2), [Zn2(L1)2(HBPT)2]·H2O (3), [Ni(L1)(BPTC)0.5(H2O)2] (4), [Ni22-O)(L2)3(Hoba)2(H2O)2] (5), and [Ni2(L2)3(BPTC)(H2O)2]·6H2O (6) [H2oba = 4,4′-oxybis(benzoic acid), H3BPT = biphenyl-3,4′,5-tricarboxylic acid, H4BPTC = biphenyl-3,3′,5,5′-tetracarboxylic acid, DMF = N,N-dimethylformamide] were achieved and structurally characterized. MOFs 1, 3, 4, and 5 are different two-dimensional networks, which are further joined together by hydrogen bonds to generate three-dimensional (3D) supramolecular frameworks. 2 is a (4,4)-connected binodal 3D framework with a point symbol of {3·4·5·83}4{32·82·92}, while 6 is a diamond 3D framework. The results show that coordination geometry of the metal centers and coordination mode of the ligands play important roles in the formation of MOFs with diverse structures. Moreover, luminescent studies showed that 1 and 3 represent highly efficient quenching for detecting Fe3+ ions and acetone molecules. In addition, 6 exhibits selectively adsorption of CO2 over N2.

中文翻译:

具有多羧酸盐和含1 H-咪唑-4-基配体的金属有机骨架的结构多样性和传感特性

两个含1 H-咪唑-4-基的配体1,3-二(1 H-咪唑-4-基)苯(L 1)和4,4'-二(1 H-咪唑-4-基)联苯(L 2)用于在水热和溶剂热条件下与相应的金属盐与各种羧酸盐配体反应,以及六种新的金属有机骨架(MOF)[Cd(L 1)(oba)]·DMF(1), [Ni 3(L 12(BPT)2(H 2 O)4 ](2),[Zn 2(L 12(HBPT)2 ]·H2 O(3),[镍(L 1)(BPTC)0.5(H 2 O)2 ](4),[镍2(μ 2 -O)(L 23(HOBA)2(H 2 O)2 ](5)和[Ni 2(L 23(BPTC)(H 2 O)2 ]·6H 2 O(6)[H 2 oba = 4,4'-氧双(苯甲酸),H 3 BPT =联苯-3,4',5-三羧酸H 4获得了BPTC =联苯-3,3′,5,5′-四羧酸,DMF =NN-二甲基甲酰胺。的MOF 134,和5是不同的二维网络,其通过氢键进一步连接在一起,以产生三维(3D)超分子框架。2是一个(4,4)连接的双脚3D框架,其点符号为{3·4·5·8 3 } 4 {3 2 ·8 2 ·9 2 },而6是菱形3D框架。结果表明,金属中心的配位几何形状和配体的配位方式在结构多样的MOFs的形成中起着重要作用。此外,发光研究表明13代表用于检测Fe 3+离子和丙酮分子的高效淬灭。另外,6在N 2上选择性地表现出CO 2的吸附。
更新日期:2018-01-16
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