Synthesis, Crystal Structure and Luminescent/magnetic Properties of Two Metal-organic Frameworks Based on Multi-N/O-donor Mixed Ligands

Two new complexes, namely [Cd(L)(pycy)(Cl)]·2 HO(1) and [Cu(HL)(Hbtac)]·2 HO, have been synthesized by the reaction of the corresponding metal salts with mixed ligands including 1-(1 H-imidazol-4-yl)-4-(4 H-tetrazol-5-yl)benzene(HL), 2,6-pyridinedicarboxylic acid(H2 pycy) and 1,2,4,5-benzenetetracarboxylic acid(H4 btac), and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis and powder X-ray diffraction(PXRD). Complex 1 crystallizes in triclinic, space group P■ with a = 9.8938(7), b = 10.1662(7), c = 12.4520(8) ?, α = 92.7070(10), β = 108.1310(10), γ = 105.3230(10)°, V = 1136.44(13) ?3, Z = 2, C17 H12 N7 O6 Cl Cd2, Mr = 670.59, Dc = 1.960 g/cm3, μ = 2.037 mm-1, S = 1.062, F(000) = 648, the final R = 0.0532 and w R = 0.1651 for 12156 observed reflections(I > 2σ(I)). Complex 2 crystallizes in triclinic, space group P■ with a = 7.3058(8), b = 7.4890(8), c = 10.8937(12) ?, α = 71.3810(10), β = 84.134(2), γ = 65.745(2)°, V = 514.68(10) ?3, Z = 1, CHCu N6 O10, M= 563.94, D= 1.819 g/cm~3, μ = 1.139 mm-1, S = 1.187, F(000) = 287, the final R = 0.0314 and w R = 0.0807 for 3564 observed reflections(I > 2σ(I)). Single-crystal X-ray structural analysis reveals that complex 1 features a trinodal(3,3,4)-connected two-dimensional(2 D) net layer with Schl?fli symbol(4·6·8)(4·6~2·8~3)(6~2·8) while 2 has a 2 D network with 4~4 sql topology. Moreover, the photoluminescent property of 1 and magnetic property of 2 were also discussed.