Crystal structure and photoluminescence of a new two-dimensional Cd(II) coordination polymer based on 3-(carboxymethoxy)-2-naphthoic acid

A new Cd(II) coordination polymer, [Cd(CNA)](n) (1) (H-2 CNA = 3-(carboxymethoxy)-2-naphthoic acid), was hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction. The crystals are monoclinic, space group P2(1)/c with a = 16.9698(18), b = 7.8314(8), c = 8.9553(10) angstrom, beta = 100.657(2)degrees, V = 1169.6(2) angstrom(3), Z = 4, D-calcd. = 2.03 g cm(-3), mu(MoK alpha) = 1.9 mm(-1), F(000) = 696 e, R = 0.0305, wR = 0.0784 for 172 refined parameters and 2285 data. Each CNA anion bridges three Cd(II) cations to give rise to a two-dimensional network structure. Topologically, if each CNA anion is regarded as a linker, and each Cd(II) atom considered as a 4-conencted node, the structure is simplified as a 4-connected (4,4) network. The solid state photoluminescent properties of the compound were also studied at room temperature.