Search

Abstract: Two new bimetallic sulfides, (Haep)2·Ga2Sb2S7 (1) and Mn2(phen)Sb2S5 (2), have been synthesized under solvothermal conditions, where aep=1-(2-aminoethyl)piperazine and phen=1,10-phenanthroline. The structure of 1 consists of GaS4 tetrahedra and SbS3 trigonal pyramids and has a layered structure with 8-membered-ring windows. Interestingly, the interlayer organic cations form helices through extensive hydrogen bonds. Compound 2 has a neutral layered structure containing infinite Mn–S sheets. The organic species are attached directly to Mn atoms within the layers by covalent bonds and protrude into the interlayer region. Both compounds 1 and 2 exhibit intense photoluminescence upon photoexcitation at 360nm. Magnetic susceptibility measurements demonstrate the existence of antiferromagnetic interactions in compound 2. Crystal data: 1, orthorhombic, P212121 (No. 19), a =9.9274(2)Å, b =12.9201(3)Å, c =21.2254(4)Å, V =2722.43(10)Å3, Z =4; 2, monoclinic, P21/c (No. 14), a =12.6385(3)Å, b =12.3998(3)Å, c =12.3670(3)Å, β =111.8240(10)°, V =1799.19(7)Å3, Z =4. [Copyright &y& Elsevier]

We report a family of carbon materials (denoted SFZ8C) prepared from templated carbonization of zeolitic imidazolate framework-8 (ZIF-8) in NaCl–ZnCl 2 eutectic salt. The hard-templating effect of the salt is utilized to sustain the framework and maximize the porosity during carbonization. In addition to rich surface nitrogen and oxygen species, SFZ8Cs have large specific surface area. These combined features give rise to excellent adsorption properties for light hydrocarbon gases. SFZ8Cs have both C 2 H 2 /CO 2 selective and C 3 /C 2 selective adsorption, as well as the ability to selectively remove impurities from methane. Particularly noteworthy is the excellent C 3 /C 2 selective adsorption performance by SFZ8C-900. Its propane/ethane selectivity (7.68) is on par with the best value (7.72) reported so far, yet SFZ8C-900 excels in propane uptake capacity. The multifunctional properties together with the ease for the mass production make SFZ8Cs promising for a number of important applications. Multifunctional Selective Adsorption: Using environmentally friendly solvent-free synthesized ZIF-8 as carbon precursors and NaCl–ZnCl 2 eutectic salt as hard template, porous carbon materials with rich nitrogen sites were obtained. They exhibit strong performance for multiple separation processes such as acetylene/carbon dioxide, three-carbon/two-carbon (C 3 /C 2), and impurity/methane. [Display omitted] [ABSTRACT FROM AUTHOR]

CaYGaO 4 was synthesized by conventional solid-state method. Its crystal structure was determined by single-crystal X-ray diffraction technique to be olivine structure type. CaYGaO 4 comprises an orthorhombic space group Pnma , with lattice constants of a = 11.3484(1) Å, b = 6.5712(6) Å and c = 5.2818(8) Å. All three cations occupy their specific atomic positions and the structure is fully ordered. The crystallographic ordering scheme in the new gallate system, is different from those reported for the previously studied silicate and germanate olivines. The partial replacement of the Ga 3+ by Fe 3+ ions could be achieved, resulting in a series of solid solutions with the chemical composition of CaYGa 1− x Fe x O 4 (0 < x ⩽ 0.50). The unit cell volumes of the doped variants are consistent with Vegard’s law. [ABSTRACT FROM AUTHOR]