Hydrothermal Synthesis, Crystal Structure and Luminescent Property of a Cd(II) Compound with (4,6)-Connected Topology

A new Cd(II) coordination polymer, namely {Cd-2(L)(biimpy)(H2O)}(n) (1, H4L = 3-(3',5'-dicarboxylphenoxy)phthalic acid, biimpy = 2,6-bis(1-imdazoly)pyridine), has been successfully synthesized via the hydrothermal reactions of Cd(II) ions, H4L and biimpy. The crystal structure is of triclinic, space group P (1) over bar with a = 7.7874(5), b = 9.9716(5), c = 18.5278(6) angstrom, alpha = 91.327(4), beta = 96.689(4), gamma = 111.896(5)degrees, V = 1322.39(12) angstrom(3), C27H17Cd2N5O10, M-r = 796.26, Z = 2, D-c = 2.000 g/cm(3), F(000) = 780, mu = 1.679 mm(-1), R = 0.0345 and wR = 0.0767 for 3890 observed reflections (I > 2 sigma(I)). Single-crystal X-ray structural analysis reveals that compound 1 features a three-dimensional (3D) framework based on two different dinuclear [Cd-2(COO)(2)] building subunits, and topological analysis shows that it can be simplified into a binodal (4,6)-connected topological network with the point symbol of {3.4(2).5(2).6}{3(2).4(2).5(2).6(4).7(4).8}. Moreover, the thermal stability and luminescent property of compound 1 were also studied.