Synthesis,Structure and Luminescent Property of a Zn(Ⅱ) Complex with Mixed Multi-N Donor and 2,5-Dihydroxy-terephthalic Acid Ligands

A new complex, [Zn_2(HL)_2(2,5-OH-pbda)]n(1, L = 1-(1 H-imidazol-4-yl)-4-(4 Htetrazol-5-yl)benzene(H_2L) and 2,5-OH-H_2 pbda = 2,5-dihydroxy-terephthalic acid), has been hydrothermally prepared and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis and PXRD. Complex 1 crystallizes in monoclinic, space group P2_1/n with a = 8.8101(10), b = 17.105(2), c = 9.4014(11) ?, β = 105.704(2)o, V = 1363.9(3) ?`3, Z = 4, C_(14)H_9N_6O_3Zn, M_r = 374.64, D_c = 1.824 g/cm~3, μ = 1.831 mm~(-1), S = 1.042, F(000) = 756, the final R = 0.0309 and w R = 0.1003 for 3130 observed reflections(I 2σ(I)). The H_2L ligand was deprotonated to be an HL-anion, and coordinated with Zn~(2+) to form two-dimensional(2D) Zn_2(HL~-)_2~(2+) sheets, which were pillared by the 2,5-OH-pbda2-ligands to form a three-dimensional(3D) dmc net with Point(Schl?fli) symbol of(4·82)(4·85). The large vacancy of the dmc net is filled via mutual interpenetration of another independent framework, leading to the formation of a 2-fold interpenetrating architecture. Solid state luminescent property of 1 has been investigated.