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Issue 34, 2012
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Syntheses, structures and physical properties of transition metal–organic frameworks assembled from trigonal heterofunctional ligands

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Abstract

Six novel metal–organic frameworks (MOFs), {Mn(bpydb)(bpyHdbH)}n (1) {[Co2(bpydb)2](H2O)0.5}n (2), {[Ni0.5(bpydbH)(H2O)](DMF)2}n (3), {[Cu2(bpydb)2](H2O)0.5}n (4), {Zn(bpyHdb)2}n (5) and {[Cd0.5(bpydb)0.5(DMF)](H2O)}n (6), were successfully synthesized by assembling transition metal salts with trigonal heterofunctional ligand 4,4′-(4,4′-bipyridine-2,6-diyl) dibenzoic acid (bpydbH2) under hydrothermal and/or solvothermal conditions. Compound 1 features a rare 4-fold interpenetrating (3,5)-connected framework with hms-type topology. Isostructural compounds 2 and 4, constructed by M2(COO)4 secondary building units, exhibit a robust 3D framework with alb topological type in 2-fold interpenetrating mode. Compound 3 consists of 2D (4,4) networks, which are further assembled into the new topological framework with the symbol (53·62·8)(53·63)2 through O–H⋯O interactions. Compound 5 manifests a novel 4-connected interpenetrating framework, constructed by 2D (4,4) layers and interbedded N–H⋯O interactions. Non-interpenetrating honeycomb networks are observed in compound 6, and further packed into a 3D framework featuring 1D channels. The magnetic susceptibility of compound 2 indicates antiferromagnetic interactions between cobalt ions. The photoluminescent properties of 5 and 6 were investigated in the solid state at room temperature.

Graphical abstract: Syntheses, structures and physical properties of transition metal–organic frameworks assembled from trigonal heterofunctional ligands

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Publication details

The article was received on 17 Apr 2012, accepted on 18 May 2012 and first published on 20 Jul 2012


Article type: Paper
DOI: 10.1039/C2DT30826F
Citation: Dalton Trans., 2012,41, 10412-10421
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    Syntheses, structures and physical properties of transition metal–organic frameworks assembled from trigonal heterofunctional ligands

    S. Song, X. Song, S. Zhao, C. Qin, S. Su, M. Zhu, Z. Hao and H. Zhang, Dalton Trans., 2012, 41, 10412
    DOI: 10.1039/C2DT30826F

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