A series of MOFs based on a triangular tri(4-pyridylphenyl)amine ligand combined with carboxylate or nitrate auxiliary ligands

A series of new metal-organic frameworks (MOFs) based on a triangular tri(4-pyridylphenyl) amine (TPPA) ligand that possess novel structures and features, namely [Co-2(TPPA)(2)(1,3-bdc)(2)(H2O)](n) (1); [Zn(TPPA)(1,3-bdc)](n) (2); [Zn-6(TPPA)(2)(betc)(Hbetc)(2)(H(2)betc)(H2O)(6)center dot 7H(2)O center dot 2DMA](n) (3) and [Cu(TPPA)(NO3)(2)(H2O)]center dot 2H(2)O](n) (4) (1,3-H(2)bdc = 1,3-benzenedicarboxylic acid, betc = 1,2,4,5-benzenetetracarboxylic dianhydride), have been synthesized under solvothermal conditions. In our work different MOFs were synthesized from different metal ions and in different solvents, leading to a variety of coordination modes and structures. In addition, the photochemical properties of compounds 1-4 and the ligands in the solid state were studied.