Two novel 2D metal–organic frameworks based on biphenyl-2,2′,6,6′-tetracarboxylic acid: Synthesis, structures and luminescent properties

Two novel metal–organic frameworks (MOFs) assembled from H4BPTC, {[Co2(BPTC)(H2O)4(DMF)2]2H2O} 1, {[Mn2(BPTC)(H2O)4(DMF)2]2H2O} 2, (H4BPTC = biphenyl-2,2′,6,6′-tetracarboxylic acid, DMF = N,N-dimethylformamide) have been obtained under hydrothermal conditions, and structurally characterized by single-crystal X-ray diffraction. The results reveal that compounds 1 and 2 are isostructural except the different metal centers, exhibiting a 2D layer structure with 4–4 net. 1 and 2 are also characterized by elemental analysis, IR spectra, TGA analysis and PXRD. The luminescent properties of 1 and 2 in solid state are discussed.