Min Wang

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.

Introducing p-block metals into iodoargentates: structures and properties of two new heterometallic hybrids

Two new heterometallic complexes, [Bi(phen)I4Ag(phen)] n (1) and [Pb(bipy)Ag3I5] n (2) (phen = 1,10-phenanthroline, bipy = 2,2′-bipyridine), have been synthesized, significant for incorporation of heavy p-block metals (Pb and Bi) into iodoargentate frameworks to get heterometallic complexes. Complex 1 could be described as the combination of Ag(phen)I4 and Bi(phen)I4 octahedra by edge-sharing and 2 is constructed from and [Pb(2,2′-bipy)]2+ by Pb–I covalent bonds. Their optical band gaps, fluorescences, and thermal behaviors are also discussed.

Preparation and Characterization of Two Bismuth(III) Iodide Inorganic/Organic Hybrid Solids

Two new organic/bismuth(III) iodide hybrids have been synthesized by a solution process, and their crystal structures were determined by an x-ray diffraction method. The first one, (EMP)3(Bi2I9) (EMP+ = N-ethyl-4-methyl-pyridinium) (1), crystallizes in the monoclinic system, space group P21/c, with M r = 3838.20, a = 19.945(4), b = 12.636(3), c = 20.327(4) Å, β = 118.82(3)°, V = 4488.4(16) Å3, Z = 2, D c = 2.840 g/cm3, F(000) = 3358, μ(MoKα) = 14.039 mm−1, the final R = 0.0678, and wR = 0.1676 for 7272 observed reflections with I > 2σ(I). The second, [(Phendione)BiI4]·(Phendione-H)·C2H5OH (Phendione = 1,10-phenathroline-5,6-dione) (2), belongs to the monoclinic system, space group C2/c, with M r = 1183.02, a = 37.254(8), b = 8.1776(16), c = 22.318(5) Å, β = 111.38(3)°, V = 6331(2) Å3, Z = 8, D c = 2.842 g/cm3, F(000) = 4296, μ(MoKα) = 9.511 mm−1, the final R = 0.0526, and wR = 0.1050 for 6555 observed reflections with I > 2σ(I). Compound 1 contains halobismuthate dimers, and it is noteworthy that the dimers and its organic countercations connect with each other by C–H···I hydrogen bonds to form a layered structure. Compound 2 is composed of [(Phendione)BiI4]− anions and Phendione-H+ cations, and hydrogen bonds contribute to give a one-dimensional (1-D) chain. The optical absorption spectra of 1 and 2 reveal the appearance of sharp optical gaps of 2.17 and 1.93 eV, respectively.

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.