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

Two metal–organic framework compounds, [Zn3(1,4-BDC)3(Py)2]·2(1,4-dioxane) (MOF-CJ6) and [Cd3(bpdc)3(H2O)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) Å, b = 9.6194(6) Å, c = 15.9161(16) Å and β = 105.687(6)°. Its framework can be described as a 2-D 36 tessellated net based on the assembly of trimeric Zn3(CO2)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 π–π packing interaction. MOF-CJ7 crystallizes in trigonal, space group R-3 (no. 148) with a = 14.1129(8) Å, b = 14.1129(8) Å, c = 20.1168(13) Å and γ = 120°. MOF-CJ7 exhibits analogous framework topology with that of MOF-CJ6, consisting of trimeric Cd3(CO2)6 clusters and 4,4′-biphenyldicarboxylate links.