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A new Lewis-base adduct of the iodo-bridged lead(II) compound {[PbI2(DPP)]·DMF} n (1) (DPP = 4,7-diphenyl-1,10-phentheanthroline) has been synthesized and structurally determined. The compound 1 crystallizes in the monoclinic system, space group P21/a, with unit cell parameters a = 9.1129(3), b = 24.0033(5), c = 24.4016(6) Å, β = 95.9460(9)°, V = 5308.9(2) Å3, Z = 8, M r = 866.48, D c = 2.168g/cm3, F(000) = 3216, μ(MoKα) = 8.706, and the final R = 0.0373 and wR = 0.0902 for 9408 observed reflections with I ≥ 2σ(I). In 1, the lead centers are in a distorted octahedral environment with stereochemical active 6s2 lone pair, and a one-dimensional chain via edge-sharing of PbI4N2 octahedra can be observed. Furthermore, π···π interaction and hydrogen bonds contribute to the formation of a three-dimensional (3-D) network. The optical band gap of 1 is 2.66 eV, judged from the absorption spectrum. Its fluorescence has also been discussed. Density function theory (DFT) calculation was executed for its electronic structure. [ABSTRACT FROM AUTHOR]

A new cation-induced hybrid iodoargentate, [(PIP-H2)4·(Ag4I12)·H2O]n (1) (PIP = piperazine) has been obtained by the routine synthetic reaction in DMF solution and structurally determined. 1 crystallizes in monoclinic system, space group P21/n with unit cell parameters: a = 12.718(3), b = 9.3861(19), c = 20.098(4)Å, β = 90.33(3)°, V = 2399.1(8)Å3, Z = 4, C8H24Ag2I6N4O, Mr = 1169.45, Dc = 3.238 g/cm3, F(000) = 2080, μ(MoKα) = 9.356mm-1, the final R1 = 0.0681 and wR = 0.1757 for 5255 observed reflections with I > 2σ(I). In 1, 0-D [Ag4I12]8- clusters were constructed from four vertex-sharing AgI4 tetrahedra and further linked by hydrogen bonds to give a 2-D layer. Luminescence can be detected in the title compound. Quantum chemistry calculation with DFT method was carried out to reveal its electronic structure. [ABSTRACT FROM AUTHOR]