Polymeric Iodoplumbate Incorporating Copper Iodide Complex Cation Layer:Structure and Theoretical Study of a New Semi-conductive Hybrid:{[Cu(Ⅱ)(bipy)_2I][PbI_3](H_2O)_2}_n

A new iodoplumbate polymer incorporating copper iodide complex cation {[Cu（Ⅱ）（bipy）2I][PbI3]（H2O）2}n 1（bipy = 2,2＇-bipyridine） has been synthesized and structurally determined.It crystallizes in the triclinic system,space group P1 with a = 7.979（4）,b = 14.538（11）,c = 15.853（8）,α = 110.77（2）,β = 97.955（18）,γ = 104.88（2）°,V = 1607.3（17）3,Z = 2,C20H16CuI4N4O2Pb,Mr = 1122.72,Dc = 2.320 g/cm3,F（000） = 1006,μ（MoKα） = 9.753,the final R = 0.0627 and wR = 0.1741 for 4846 observed reflections with Ⅰ 〉 2σ（Ⅰ）.Structural analysis indicates that 1 consists of 2-D {[Cu（Ⅱ）（bipy）2I]}nn＋ cation layers（based on π-π interaction and hydrogen bonds） and [PbI3]nn-polyanions.The C-H···I hydrogen bonds between {[Cu（Ⅱ）（bipy）2I]}nn＋ cation layers and [PbI3]nn-polyanions lead to the formation of an interesting 3-D network.Optical absorp-tion spectrum indicates that 1 is a semiconductor,which is further validated by DFT calculation.Its electronic structure is also discussed.

Synthesis and Crystal Structure of a New Organic-inorganic Hybrid One-dimensional Polymer: [Zn(C_8H_(23)N_5)]_2(Pb_3I_(10))

A new organic-inorganic hybrid coordinated polymer [Zn(C8H23N5)]2(Pb3I10) (C8H23N5 = tetraethylene pentamine) was synthesized by hydrothermal reaction. It crystallizes in triclinic, space group P1 with a = 9.781(2), b = 11.442(3), c = 11.565(3) ?, α = 99.075(8), β = 90.540(9), γ = 109.967(5)o, Zn2C16H46N10Pb3I10, Mr = 2399.94, V = 1198.4(5) ?3, Z = 1, Dc = 3.325 g/cm3, F(000) = 1048.0, μ(MoKα) = 17.951 mm-1, the final R = 0.0412 and wR = 0.0993 for 3375 observed reflections with I > 2σ(I). The title compound consists of [Zn(C8H23N5)]2+ cations and anionic chains [Pb3I10]n4n-, which are combined with each other via electrostatic attractive forces and N–H…I hydrogen bonds.

Synthesis,Crystal Structure and Luminescent Property of a 2-D Hybrid Constructed from [Pb_2I_4] Subunits

A novel organic-inorganic hybrid compound, [Pb2I4（bipy）], （bipy = 4,4′-bipyridine）, was synthesized by self-assembly and its structure was determined by X-ray crystallography method The crystal belongs to the monoclinic system, space group P2 1/c with α = 4.4691（9）, b = 15.385（3）, c = 14.136（3） A, β = 93.75（3）°, V= 969.9（3） A^3, Mr = 1078.16, Dc= 3.692 g/cm^3, F（000） = 916, μ = 23.688 mm^-1, Z = 2, the final R = 0.0395 and wR = 0.0887 for 1557 observed reflections with I 〉 2σ（I）. The title compound presents a two-dimensional layer-like structure constructed from [PbI5N] octahedron and bis-bridging ligand 4,4′-bipyridine. The fluorescence of the title compound is also discussed in this communication.

Structure and Semiconducting Character of a Polymeric Iodoplumbate Coordination Complex

A new polymeric iodoplumbate complex [Zn（DMF）6][Pb2I6] 1 has been prepared and characterized by elemental analysis and single-crystal X-ray analysis. Its structure contains infinite iodoplumbate chains constructed by the [PbI5] subunit. EHT crystal orbital calculation and the experimental results show that this material is an unconventional semiconductor and the electrical character is associated with its structural feature.

In situ Alkylation of 4,4'-Bipyridine in Hydrothermal Synthesis of an Iodoplumbate Inorganic-organic Hybrid with Fluorescence

A novel 1-D iodoplumbate hybrid, 2（Pb3I9）^3＊·3（C14H18N2）^2＋ 1, has been hydrothermally synthesized and characterized by IR spectra, TGA and single-crystal X-ray diffraction. Complex 1 crystallizes in monoclinic, space group P21/c, with a = 12.057（2）, b = 14.024（3）, c = 24.742（5） A, β = 90.48（3）°, V = 4183.6（14） A^3, Z = 4, R= 0.0477 and wR = 0.0800. The title compound consists of 1-D chains （Pb3I9）n^3n＊ parallel to the [100] direction and stacks of alkylated 4,4＇-bipyridium cations running along the [011] direction. Each anionic chain is surrounded by six arrays of alkylated 4,4＇-bipyridium cations through extensive C-H…I atypical hydrogen-bonding interactions to afford an interesting 3-D supramolecular network. Significant fluorescent property of the compound was observed at room temperature.

Iodoplumbate(Ⅱ)-based Hybrid Templated by 1,4-Diazabicyclo[2.2.2]octane Derivative：Structure,Photocurrent Response Behavior and Photocatalytic Activity for the Degradation of Organic Dye

A new iodoplumbate/organic hybrid,[（Et_2DABCO）_2（Pb_3I_（11））（H3 O）]n（1,Et_2DABCO = N,N？-diethyl-1,4-diazabicyclo[2.2.2] octane） has been synthesized using solution method.According to X-ray diffraction structural analysis,the unique（Pb_3I_（11））_n^（5n-） chain in 1 is constructed from face-and edge-sharing PbI_6 octahedra,which is templated by（Et_2DABCO）^（2＋） dication possessing both rigidity and flexibility.C-H...I hydrogen bonds contribute to the structure extending from 1D chains to a 3D network.Its energy band gap of 2.64 eV indicates its broad-gap semiconductor nature.It exhibits both photocurrent response property and photocatalytic activity for the degradation of rhodamine B.

Synthesis of stable iodoplumbate and perovskite for efficient annealing-free device and long-term storage

As a next-generation photovoltaic device,perovskite solar cells are rapidly emerging.Nevertheless,both solution and device stability pose challenges for commercialization due to chemical degradation caused by internal and external factors.Especially,the decomposition of iodoplumbate in a perovskite solution hinders the long-term use of perovskite solutions.Moreover,the synthesis of stable perovskites at low temperature is important for stable devices and wide applications(flexible devices and high reproducibility).Herein,the critical composition of perovskite is found to obtain high stabilities of both iodoplumbate and perovskite crystals by utilizing CsPbBr_(3) and FAPbI_(3),exhibiting high device performance and long-term solution storage.The novel composition of CsPbBr_(3)-alloyed FAPbI_(3) not only crystallizes under annealing-free conditions but also demonstrates excellent iodoplumbate stability for 100 days(∼3000 h)without any degradation.Furthermore,high device stabilities are achieved over 2000 and 3000 h under extreme conditions of A.M.1.5 and 85℃/85%relative humidity,respectively.Overall,the device exhibited a high power conversion efficiency of 23.4%,and furthermore,CsPbBr_(3)-alloyed FAPbI_(3) was devoted to widen the applications in both flexible and carbon-electrode devices,thereby addressing both scientific depths and potential commercial materials.