Two 2-D 36 tessellated metal–organic frameworks constructed from trimetallic clusters and dicarboxylate ditopic links

Two metal-organic framework compounds, [Zn{sub 3}(1,4-BDC){sub 3}(Py){sub 2}].2(1,4-dioxane) (MOF-CJ6) and [Cd{sub 3}(bpdc){sub 3}(H{sub 2}O){sub 2}] (MOF-CJ7), have been solvothermally synthesized and characterized by single crystal X-ray diffraction, X-ray powder diffraction, ICP, IR and photoluminescence spectroscopy analyses, respectively. MOF-CJ6 crystallizes in monoclinic, space group P2(1)/n (no. 14) with a = 14.6886(14) A, b = 9.6194(6) A, c = 15.9161(16) A and {beta} = 105.687(6){sup o}. Its framework can be described as a 2-D 3{sup 6} tessellated net based on the assembly of trimeric Zn{sub 3}(CO{sub 2}){sub 6} clusters and 1,4-benzenedicarboxylates ditopic links. The 2-D nets can be further linked into a novel 3-D supramolecular hexagonal lattice (hex) network through {pi}-{pi} packing interaction. MOF-CJ7 crystallizes in trigonal, space group R-3 (no. 148) with a = 14.1129(8) A, b = 14.1129(8) A, c = 20.1168(13) A and {gamma} = 120{sup o}. MOF-CJ7 exhibits analogous framework topology with that of MOF-CJ6, consisting of trimeric Cd{sub 3}(CO{sub 2}){sub 6} clusters and 4,4'-biphenyldicarboxylate links.