Unusual [CdII3O2(CO2)8] clusters as SBUs for the construction of a new pcu-type metal-organic framework

A novel 3D metal-organic framework (Me2NH2)2[Cd3(H2-DHBDC)3(CH3COO)2(DMF)2](DMF)2 (H4-DHBDC = 2,5-dihydroxy-1,4-benzenedicarboxylic acid) with unusual [CdII3O2(CO2)8] building blocks has been solvothermally synthesized. It features a typical pcu topology by reducing the [CdII3O2(CO2)8] building blocks as the 6-connected nodes. The physical properties such as thermogravimetric analyses (TGA), IR, elemental analysis, powder X-ray diffraction (PXRD) and photoluminescence were investigated in detail.