Hai-Jun Dong

An organic–inorganic hybrid heterobridging luminescent copper(I) polymer exhibiting thermochromic behavior

A 3-D organic–inorganic hybrid heterobridging copper(I) polymer {[Cu2I2(Hgtsc)]·2DMF}n (1A) (Hgtsc=glyoxal-dithiosemicarbazone) with an unusual bridging mode involving iodine and sulfur atoms has been structurally determined, which was constructed from supramolecular interactions between 2-D hybrid layers [Cu2I2(Hgtsc)]n and solvent molecules (DMF). Strong luminescence can be detected and interestingly, thermochromic behavior can be observed.

Synthesis, Properties, and Theoretical Study of a Cation-Induced Iodoargentate Hybrid: [(PIP-H2)4·(Ag4I12)·H2O] n

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, M r = 1169.45, D c = 3.238 g/cm3, F(000) = 2080, μ(MoKα) = 9.356mm−1, the final R 1 = 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.

Structure and property variations of lead iodide–organic coordination polymers tuned by substituted groups on phenanthroline

Three lead iodide–organic coordination polymers with different substituents on 1,10-phenanthroline, [(5-S-phen)PbI2]n (S = –NO2(1), –Cl(2) and –NH2(3)) have been synthesized in polar organic solvent under nearly the same conditions. 1 and 2 are structurally similar to each other, and exhibit 3-D networks based on inter-layer hydrogen bond interactions. 3 also gives 3-D arrangement viahydrogen bonds among 1-D chains. To our interest, we found that the ligands electronic nature is the dominant factor in the dimension extending behavior; EWGs (electron-withdrawing group) on the phenanthroline ring will lead to larger electron mobility in a coordinated skeleton, but EDGs (electron-donating group) will give a smaller charge carrier mobility. Consequently, from EWGs to EDGs, an enlarged band gap can be observed. Their luminescences were also discussed.

Lewis-Base Adduct of Iodo-Bridged Lead(II) Compound Constructed From Phenanthroline Derivative: Structure and Properties

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.