Mixed-solvothermal Synthesis,Crystal Structure and Luminescence of a New Dinuclear Yttrium(Ⅲ) Coordination Polymer with 1-D Wave-like Infinite Chains

A new dinuclear Y~(3+) coordination polymer{Y_2(H_2O)_2(C_(14)H_8O_4)_3(C_(12)H_8N_2)_2]·3 H_2O}_n (1, C_(14)H_8 O_4 = 2,2?-biphenyldicarboxylate, phen = 1,10-phenanthroline), has been obtained by means of a mixed-solvothermal method using ethylene glycol and water as solvent. The compound was characterized by elemental analysis, energy-dispersive X-ray spectroscopy(EDS), IR spectrum and single-crystal X-ray diffraction. The results reveal that 1 belongs to monoclinic system, space group C2/c with a = 24.249(3), b = 12.069(48), c = 22.7304(08) ?, β = 113.480(7)°, Z = 4, V = 6102(2) ?~3, Dc = 1.462 g·cm~(-3), F(000) = 2728, μ = 1.968 mm~(-1), the final R = 0.0673, w R = 0.1508 and S = 1.085. Its structure can be regarded as a 1-D coordination polymer constructed by Y~(3+) cations, 2,2?-biphenyldicarboxylate, 1,10-phenanthroline and water molecules. The compound not only contains two kinds of organic ligands, but also exhibits interesting wave-like infinite chains and 18-MR windows with the diameter of 4.070(7)? × 5.326(9)?. The structure is further stabilized by means of O–H···O hydrogen bonds and π-π stacking interactions. Furthermore, the luminescent properties(including emission spectrum, CIE chromaticity coordinate and decay curve) of 1 were also investigated in the solid-state at room temperature.