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Issue 9, 2015
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Construction of Zn(II) and Cd(II) metal–organic frameworks of diimidazole and dicarboxylate mixed ligands for the catalytic photodegradation of rhodamine B in water

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Abstract

A set of four metal–organic frameworks, namely, [Zn(1,3-BDC)(bmimb)]n (1), [Zn(1,4-BDC)(bmimb)]n (2), [Cd(1,3-BDC)(bmimb)]n (3), and [Cd(1,4-BDC)(bmimb)]n (4), have been prepared under solvothermal conditions (1,3-BDC = 1,3-benzenedicarboxylate; 1,4-BDC = 1,4-benzenedicarboxylate; bmimb = 4,4′-bis(4-methyl-1-imidazolyl)biphenyl). The long bmimb ligand (N⋯N separation of ca. 14.1 Å) induces interpenetration of 1, 2 and 4 to increase both the framework stability and the density of effective catalytic metal centers. Compounds 1, 2 and 4 are interpenetrated 3D structures while 3 features a 2D structure. Compound 1 exhibits a parallel 2D → 3D polycatenation while 2 and 4 are isomorphous and feature 3D → 3D interpenetration. Compounds 1–4 fluoresce in the range of 350–372 nm in the solid state, whereas compounds 2 and 3 catalyze the almost complete photodegradation of rhodamine B (RhB) in water within ca. 4 h and can be recycled at least five times without loss in their crystallinity.

Graphical abstract: Construction of Zn(ii) and Cd(ii) metal–organic frameworks of diimidazole and dicarboxylate mixed ligands for the catalytic photodegradation of rhodamine B in water

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The article was received on 15 Oct 2014, accepted on 20 Nov 2014 and first published on 24 Nov 2014


Article type: Paper
DOI: 10.1039/C4CE02074J
Citation: CrystEngComm, 2015,17, 1935-1943
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    Construction of Zn(II) and Cd(II) metal–organic frameworks of diimidazole and dicarboxylate mixed ligands for the catalytic photodegradation of rhodamine B in water

    C. Lü, M. Chen, W. Zhang, D. Li, M. Dai and J. Lang, CrystEngComm, 2015, 17, 1935
    DOI: 10.1039/C4CE02074J

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