Synthesis, crystal structure and photocatalytic properties of two 2-D coordination polymer constructed from pyridylmethylphosphonate

Two coordination polymers, formula [Ni(4-pmp)(H2O)(3)] (1) and [Cu(4-pmp)] (2), (4-pmp(2-) = 4-pyridylmethylphosphonate), have been hydrothermally synthesized and fully characterized. The two compounds display different two-dimensional layered structures because the 4-pmp(2-) ligand adopts different coordination modes. Compound 1 displays wave-layered structure constructed from single inorganic chain, in which each PO3 tetrahedron was corner-shared with two NiNO3 octahedrons. Compound 2 features layered structure built from double inorganic chain, in which each PO3 tetrahedron is corner-shared with three CuNO3 tetrahedrons. The photocatalytic properties of compound 1 show that it exhibits good photocatalytic activity in degradation of methylene blue (MB) and rhodamine B (RhB) organic dye.