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Issue 47, 2018
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Four new MOFs based on an imidazole-containing ligand and multicarboxylates: syntheses, structures and sorption properties

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Abstract

Four new complexes have been synthesized by solvothermal reactions of an imidazole-containing ligand 3,3′,5,5′-tetra(1H-imidazol-1-yl)-1,1′-biphenyl (L) with corresponding metal salts via the alternation of auxiliary multicarboxylates, [Zn2(L)(2,6-NDC)(OAc)2]·2H2O (1), [Zn2(L)(BPnDC)2]·6H2O (2), [Co2(L)(OBA)2]·8H2O (3) and [Zn4(L)2(ODAC)2]·2MeCN·5H2O (4) (2,6-H2NDC = 2,6-naphthalic acid, H2BPnDC = 4,4′-carbonyldibenzoic acid, H2OBA = 4,4′-oxidibenzoic acid, and H4ODAC = 3,3′,4,4′-oxidibenzene tetracarboxylic acid). The complexes were characterized by single crystal and powder X-ray diffractions, IR, elemental and thermogravimetric analysis. All of them possess different three-dimensional (3D) frameworks based on M(II)–L two-dimensional layers, which are further connected by auxiliary dicarboxylates with distinct bridging-angles and coordination numbers to obtain the final frameworks. Complex 1 is a (3,4)-connected 3D framework with gwg topology, while 2 and 3 are isostructures with a (4,4)-connected 2-fold interpenetrating 3D net. In the case of 4, it possesses a (4,4,4,4)-connected 3D architecture with a new topology. The desolvated samples 2′ and 3′ have adsorption capacities of H2O/MeOH/EtOH, while sample 4′ has remarkable selective adsorption for H2O/MeOH over EtOH.

Graphical abstract: Four new MOFs based on an imidazole-containing ligand and multicarboxylates: syntheses, structures and sorption properties

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Publication details

The article was received on 28 Aug 2018, accepted on 05 Nov 2018 and first published on 06 Nov 2018


Article type: Paper
DOI: 10.1039/C8CE01448E
Citation: CrystEngComm, 2018,20, 7719-7728
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    Four new MOFs based on an imidazole-containing ligand and multicarboxylates: syntheses, structures and sorption properties

    L. Luo, S. Liu, X. Xu, J. Xu and J. Zhao, CrystEngComm, 2018, 20, 7719
    DOI: 10.1039/C8CE01448E

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