The title complex, [Co2（bibzim）（H2bibzim）4]·Co2（H2bibzim）2（Hbibzim）（HL）]2- 2H2O （1） （HEbibzim = 2,2＇-bibenzimidazole, H5L = N,N-bis（phosphonomethyl）aminoacetic acid （HO2CCH2N（CH2PO3H2）2））, wa...
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The title complex, [Co2（bibzim）（H2bibzim）4]·Co2（H2bibzim）2（Hbibzim）（HL）]2- 2H2O （1） （HEbibzim = 2,2＇-bibenzimidazole, H5L = N,N-bis（phosphonomethyl）aminoacetic acid （HO2CCH2N（CH2PO3H2）2））, was synthesized with hydrothermal reactions. The compound crystallizes in triclinic, space group P1 with a = 13.71020（10）, b = 14.9165（5）, c = 20.9924（5） A, a = 86.344（9）, β = 71.214（8）, γ = 73.757（7）°, C162HI24Co6N46O18P4, Mr = 3478.52, V = 3900.55（16） A3, Z = 2, Dc = 1.482 g/cm3,μ（MoKa） = 0.747 mm^-1, F（000） = 1784, the final R = 0.0777 and wR = 0.2091 for 13598 observed reflections （I 〉 2σ（I））. X-ray diffraction analysis reveals that there are three crystallographically independent Co（II） atoms in the complex. The complex consists of binuclear coordination cation, binuclear coordination anion, as well as lattice water molecules, which further aggregate into a 3D framework via hydrogen bonding as well as π-π interactions.
Thermoelectric （TE） materials can convert directly low-grade heat energy to electricity, and vice versa, which is highly expected to play an important role in the future energy management. The application practice d...
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Thermoelectric （TE） materials can convert directly low-grade heat energy to electricity, and vice versa, which is highly expected to play an important role in the future energy management. The application practice demands efficient TE materials made of non-toxic and inexpensive components. Herein, we report a Ni substituted polycrystalline n-type bulk material ***3 （x = 0-0.1）. Based on density functional theory calculation, Ni tends to substitute at the In3 site in the In4Se3, which causes a monotonous unit cell volume reduction. At x=0.01, Ni substitution results in a sharp decrease in the carder concentration （he） in comparison with that of pure In4Se3, and then ne increases with the increase of Ni concentration. Ni substitution leads to a performance enhancement from 0.6 for pure In4Se3 to an optimum ZTvalue of 0.8 at 450℃.
Photo/electrochemical CO 2 splitting is impeded by the low cost‐effective catalysts for key reactions: CO 2 reduction (CDRR) and water oxidation. A porous silicon and nitrogen co‐doped carbon (SiNC) nanomaterial by ...
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Photo/electrochemical CO 2 splitting is impeded by the low cost‐effective catalysts for key reactions: CO 2 reduction (CDRR) and water oxidation. A porous silicon and nitrogen co‐doped carbon (SiNC) nanomaterial by a facile pyrolyzation was developed as a metal‐free bifunctional electrocatalyst. CO 2 ‐to‐CO and oxygen evolution (OER) partial current density under neutral conditions were enhanced by two orders of magnitude in the Tafel regime on SiNC relative to single‐doped comparisons beyond their specific area gap. The photovoltaic‐driven CO 2 splitting device with SiNC electrodes imitating photosynthesis yielded an overall solar‐to‐chemical efficiency of advanced 12.5 % (by multiplying energy efficiency of CO 2 splitting cell and photovoltaic device) at only 650 mV overpotential. Mechanism studies suggested the elastic electron structure of −Si(O)−C−N− unit in SiNC as the highly active site for CDRR and OER simultaneously by lowering the free energy of CDRR and OER intermediates adsorption.
Introduction:Rare earth Elementes(REEs)have attracted attention in many *** them,use of scandium(Sc)has continued to increase in many application *** and extraction of Sc has been attracted *** solid phase
Introduction:Rare earth Elementes(REEs)have attracted attention in many *** them,use of scandium(Sc)has continued to increase in many application *** and extraction of Sc has been attracted *** solid phase
With the development of science and technology,the demand for high-purity rare earth in the fields of functional materials increases day by *** of high purity rare earth arouses widespread attention at home and abroad...
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With the development of science and technology,the demand for high-purity rare earth in the fields of functional materials increases day by *** of high purity rare earth arouses widespread attention at home and abroad of the scientific
The structure and stoichiometry of the lanthanide(III)(Ln)complexes with the ligand Tri-n-octylphosphine oxide(TOPO)formed in a biphasic aqueous room-temperature ionic system have been *** to general organic solvent,a...
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The structure and stoichiometry of the lanthanide(III)(Ln)complexes with the ligand Tri-n-octylphosphine oxide(TOPO)formed in a biphasic aqueous room-temperature ionic system have been *** to general organic solvent,all lanthanides
A cuprous dimer [Cu（POP）]2（pz4B）BF4·（CH3CN）3 （1, POP = bis（2-（diphenylphosphanyl）phenyl）ether, pz4B- = tetrakis（pyrazol-i-yl）borate anion） was synthesized from the reaction of Cu（CH3CN）4BF4, POP a...
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A cuprous dimer [Cu（POP）]2（pz4B）BF4·（CH3CN）3 （1, POP = bis（2-（diphenylphosphanyl）phenyl）ether, pz4B- = tetrakis（pyrazol-i-yl）borate anion） was synthesized from the reaction of Cu（CH3CN）4BF4, POP and Kpz4B in CH3CN at room temperature. The compound was characterized by elemental analysis and X-ray single-Crystal structure analysis. It crystallizes in monoclinic, space group P21/c with a = 12.3491（2）, b = 20.8845（3）, c = 33.0657（4） A, β = 94.251（1）°, V = 8504.3（2） A3, Z = 4, Mr = 1693.21, Dc = 1.322 g/cm3, F（000） = 3496,μ = 1.843 mm-1, GOOF = 1.031, the final R = 0.0442 and wR = 0.1235 for 14397 observed reflections with 1〉 2σ（I）. 1 is an ionic compound. It is composed of a BF4- anion and a {[Cu（POP）]2（pz4B）}＋ cation. The cation contains two [Cu（POP）]＋ cationic moieties and a pz4B- anionic linker. The Cu（I） ions show a distorted tetrahedral coordination geometry defined by two nitrogen atoms from a pz4B- bridging ligand and two phosphorous atoms from a POP terminal chelating ligand. The complex emits blue luminescence with the maximum peak at 457 nm with 3% quantum yield in solid state at room temperature. The Cu（I） centers are essentially electronically separated because both HOMO and LUMO contain very little contribution from the bridging ligand. The unexpected low emission is ascribed to the intramolecular interaction of the emissive centers.
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