CuYS2: Ein ternäres Kupfer(I)‐Yttrium(III)‐Sulfid mit Ketten {[Cu(S1)3/3(S2)1/1]3–} cis‐kantenverknüpfter [CuS4]7–‐Tetraeder

CuYS₂: A Ternary Copper(I) Yttrium(III) Sulfide with Chains {[Cu(S1)_3/3(S2)_1/1]^3–} of cis ‐Edge Connected [CuS₄]^7– Tetrahedra Pale yellow, lath‐shaped single crystals of the ternary copper(I) yttrium(III) sulfide CuYS₂ are obtained by the oxidation of equimolar mixtures of the metals (copper and yttrium) with sulfur in the molar ratio 1 : 1 : 2 within fourteen days at 900 °C in evacuated silica ampoules, while the presence of CsCl as fluxing agent promotes their growth. The crystal structure of CuYS₂ (orthorhombic, Pnma; a = 1345.3(1), b = 398.12(4), c = 629.08(6) pm, Z = 4) exhibits chains of cis‐edge linked [CuS₄]^7– tetrahedra with the composition {[Cu(S1)_3/3(S2)_1/1]^3–} running along [010] which are hexagonally bundled as closest rod packing. Charge equalization and three‐dimensional interconnection of these anionic chains occur via octahedrally coordinated Y³⁺ cations. These are forming together with the S^2– anions a network [Y(S1)_3/3(S2)_3/3]^– of vertex‐ and edge‐shared [YS₆]^9– octahedra with ramsdellite topology. The metall‐sulfur distances of the [CuS₄]^7– tetrahedra (230 (Cu–S2), 232 (Cu–S1), and 253 pm (Cu–S1′, 2 × )) cover a very broad interval, whilst these (Y–S: 267–280 pm) within the [YS₆]^9– octahedra range rather closely together.     

纳米Co-B非晶态合金对高氯酸铵分解的催化性能

 利用化学还原法制备了纳米 Co-B 非晶态合金,并用透射电镜、X射线衍射、差示扫描量热和N2吸附表面积测试等技术对样品进行了表征. 运用差热分析研究了纳米 Co-B 非晶态合金对高氯酸铵(AP)分解的催化性能. 结果表明,加入 Co-B 非晶态合金后AP的高低温放热峰相连,合并成一个高而大的放热峰,且峰温有很大程度的降低, 这说明纳米 Co-B 非晶态合金对AP热分解有很好的催化活性. 同时, Co-B 非晶态合金能使AP的表观分解热显著增大.     

全自动SPE联合离子色谱质谱法测定化工产业园区周边地表径流中氟乙酸、碘乙酸、羟基乙酸、溴酸盐和高氯酸盐微量残留

目的 实验开发了全自动SPE联合离子色谱质谱法测定化工产业园区周边地表径流中氟乙酸、碘乙酸、羟基乙酸、溴酸盐和高氯酸盐微量残留的分析方法。方法 采集化工产业园区周边地表径流水样1000 mL,置试剂瓶中,去除肉眼可见杂质,滤纸过滤,调节水样PH至近中性;取上述水样500 mL,以流速12 mL/min的速度经固相萃取柱富集、净化,最后用10 mL甲醇溶液洗脱,合并收集的洗脱液,洗脱液置氮吹至近干,用1 mL甲醇溶液溶解残渣,0.22μm滤膜过滤,上离子色谱质谱仪定性、定量检测。结果 氟乙酸、碘乙酸、羟基乙酸、溴酸盐和高氯酸盐在浓度0.005 ~2.0μg/mL范围内,线性良好;检测限分别为0.021、0.023、0.0014、0.025和0.015 μg/L;三水平加标回收率在80%~120.6%范围内;精密度(RSD)在5.0%以内。结论 此方法检出限低、准确度和精密度好,适用于化工产业园区周边地表径流水样的检测分析。     

ChemInform Abstract: Melting and Resolidification of YBa2Cu3O7-x/Silver Composites.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Y2AlGe3 - A Superconductive Metallic Zintl Compound.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Synthesis and Crystal Structure Refinement of Cubic Mg6.8Y.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Crystal Structure of Yttrium-Scandium-Gallium Garnet.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Preparation and Crystal Structure of Rare Earth Rhenates: The Series Ln5Re2O12 with Ln: Y,Gd—Lu,and the Praseodymium Rhenates Pr3ReO8, Pr3Re2O10, and Pr4Re2O11.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.     

ChemInform Abstract: Correlation Between the Electronic Structure,Effective Mass and Thermoelectric Properties of Rare Earth Tellurides Ba2MYTe5 (M: Ga,In).

The electronic structure, electronic charge density, and band gaps of Ba₂MYTe₅ (M: Ga, In) single crystals are simulated using the full potential linearized augmented plane wave package WIEN2k.     

ChemInform Abstract: Tetrayttrium Difluoride Disilicate Orthosilicate,Y4F2[Si2O7][SiO4].

Colorless lath-shaped single crystals of the title compound are obtained from a melt of Y₂O₃, YF₃, and SiO₂ (2:5:3 molar ratio) using CsCl as a flux (evacuated silica tube, 973 K, 9 d, 10 K/h cooling rate).