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

Abstract

Four new complexes have been synthesized by solvothermal reactions of 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, 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, which further connected with auxiliary dicarboxylates with distinct bridging-angle and coordination number to obtain the final frameworks. Complex 1 is a (3,4)-connected 3D framework with gwg topology, while 2 and 3 are isostructures with (4,4)-connected 2-fold interpenetrating 3D net. In case of 4, it possesses (4,4,4,4)-connected 3D architecture with a new topology. The desolvated samples 2՛ and 3՛ have adsorption capacities of H2O/MeOH/EtOH, meanwhile sample 4՛ has remarkable selective adsorption for H2O/MeOH over EtOH.

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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, Accepted Manuscript
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    Four new MOFs based on imidazole-containing ligand and multicarboxylates: syntheses, structures and sorption properties

    L. Luo, S. liu, X. xu, J. Xu and J. Zhao, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C8CE01448E

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