One Pillared Layered Zn(Ⅱ) Coordination Compound Based on 2,6-Naphthalenedicarboxylic Acid: Synthesis,Structure and Luminescent Property

One new pillared layered zinc hydroxide {Zn4(OH)6(ndc)·2(H2O)}n,(H2 ndc =2,6-na-phthalenedicarboxylic acid) has been achieved under hydrothermal conditions by using2,6-na-phthalenedicarboxylic acid, 2,4-diami-6-phenyl-1,3,5-triazine as well as Zn(OAc)2·2 H2O,and structurally characterized by X-ray single-crystal diffraction, IR spectra, elemental analysis,powder X-ray diffraction(PXRD) and thermogravimetric analysis(TGA). The X-ray single-crystal diffraction proves that the title compound is in monoclinic system, space group P21/c with a =16.362(8), b = 9.324(5), c = 5.364(3)A,β= 99.081(9)°, V = 808.1(7)A^3, Dc = 2.522 g/cm3, Mr =613.73, Z = 2, F(000)= 608,μ= 5.935 mm-1, GOOF = 1.050, R = 0.0469 and wR(Ⅰ> 2σ(Ⅰ))=0.1291. In the title compound, the tetrahedral and octahedral zinc atoms are connected by μ3-OH groups to form zinc hydroxide inorganic layers extending parallel to the bc-plane. The adjacent layers are pillared by the connection of Zn2 atoms with ndc2-ligands to construct a three-dimensional(3D) structure;meanwhile, the interactions of five hydrogen bonds make the 3D network structure more stable. Furthermore, the title compound exhibits luminescent property at solid state.