顺式二(乙二胺)二硝基合钴(Ⅲ)酒石酸锑盐晶体结构和分子的绝对构型

顺式二(乙二胺)二硝基合钴(Ⅲ)酒石酸锑盐，Δ-cis-［Co(en)₂(NO₂)₂］₂-d-［Sb₂(C₄H₂O_{6)2］·2H2O，是由酒石酸锑钾对外消旋混合物cis-［Co(en)2(NO2)2］Cl进行拆分的产物。标题化合物(Sb2Co2C16N12O22H40)的晶体结构由衍射方法确定。晶体学参数为：正交晶系，空间群P212121,a=10.033(5), b=13.203(2),c=25.928(7)(),V=3434(2)^{3,Z=4,Mr=1114.06, Dc=2.156Mgm-3,μ=21.07 mm-1,F(000)=2208, R=0.072,RW=0.084。结构表明，分子由2个Co(Ⅲ)配离子和一个酒石酸锑阴离子及两个水分子组成，阴离子为一双核螯合离子。Sb原子一对孤对电子与其周围四个配位氧原子形成变形三角双锥结构。通过Co和Sb原子对CuKα射线的反常散射效应确定了分子的绝对构型。二个Co(Ⅲ)离子均为Δ构型，酒石酸锑阴离子为R构型。结构分析表明，标题化合物中三点接触离子对在手性识别中起重要作用。}}     

Variations of the shape of123Sb NQR tines in phase transitions in K2SbF5

Variations of the shape of¹²³Sb NQR lines in phase transitions in a new ionic conductor, potassium pentafluoroantimonite(ui), in the temperature range from 77 to 430 K were studied. The transition from a paraelectric phase to a commensurate phase occurs via incommensurate and commensurate-modulated phases.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2497–2500, October, 1996.     

Laser Sintering of SnO2 : Sb Sol-Gel Coatings

Sb doped sol-gel SnO2 single layers (thickness 100 nm) were prepared from alcoholic solution and deposited via a dip coating process on fused silica substrates. The coatings have been sintered at a typical rate of 10–15 cm2/s by CO2 laser irradiation. The laser spot was scanned in one direction at a speed of 15,000 cm/s and the sample was moved in a perpendicular one at a speed up to 250 mm/s. The temperature of the topmost 10 m layer was monitored by a fast pyrometer (s resolution). The following properties of the coatings have been determined: the electrical resistivity , the carrier density n, and mobility , the structure, the thickness, the mesoscopic and micromorphology and the density. The sintering by CO2 laser radiation is mainly a thermal driven process. At T 500°C it allows to obtain coatings with a smaller resistivity (6.8×10–3 cm) than those produced by conventional furnace firing (el2.9×10–2 cm). The results are discussed in terms of particle size and packing density.     

涂膏热解法制备钛基Sn、Sb氧化物电极

研究了涂膏热解法制备Ti/Sn、Sb氧化物电极的新工艺，考察了SnCl4、SbCl3加入量和烧结温度对电极寿命和析氧电位的影响，并对电极进行了SEM、EDS、XRD测试.结果表明，在涂层厚度相近时，涂膏法制备的电极与热解法相比，具有表面氧化物分布均匀和TiO2不易裸露的优点，从而提高了析氧电位，延长了电极寿命，使电极具有很高的电催化活性和电化学稳定性.     

121,123Sb NQR investigation of chlorofluoroantimonates(III) M2SbCl3F2 (M = Rb. Cs,and NH4)

Antimony(m) chlorofluoride complexes M₂SbCl₃F₂ (M = Rb, Cs, or NH₄) were studied by the^121,123Sb NQR method. A temperature range (77–285 K) with anomalous change in the NQR parameters and a second-order phase transition at 250–280 K for (NH₄)₂SbCl₃F₂ were found.Translated from Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 382–385, February, 1996     

Speciation analysis of inorganic Sb(III) and Sb(V) ions by using mini column filled with Amberlite XAD-8 resin

The speciation of inorganic Sb(III) and Sb(V) ions in aqueous solution was studied. The adsorption behavior of Sb(III) and Sb(V) ions were investigated as iodo and ammonium pyrollidine dithiocarbamate (APDC) complexes on a column filled with Amberlite XAD-8 resin. Sb(III) and Sb(V) ions were recovered quantitatively and simultaneously from a solution containing 0.8 M NaI and 0.2 M H₂SO₄ by the XAD-8 column. Sb(III) ions were also adsorbed quantitatively as an APDC complex, but the recovery of the Sb(V)-APDC complex was found to be <10% at pH 5. According to these data, the concentrations of total antimony as Sb(III)+Sb(V) ions and Sb(III) ion were determined with XAD-8/NaI+H₂SO₄ and XAD-8/APDC systems, respectively. The Sb(V) ion concentration was calculated by subtracting the Sb(III) concentration found with XAD-8/APDC system from the total antimony concentration found with XAD-8/NaI+H₂SO₄ system. The developed method was applied to determine Sb(III) and Sb(V) ions in samples of artificial seawater and wastewater.     

石墨炉原子吸收法测定岩石和土样中的锑

本文用石墨炉原子吸收法对岩石土样中Ｓｂ的测定方法进行了研究。对工作条件、测定酸度、涂层管，共存离子的干扰与消除、回收及精密度等进行了实验。采用Ｎｉ作为基体改进剂可以消除干扰元素对Ｓｂ的影响。此方法的回收率和精密度比较满意。     

Higher-order solution for dust acoustic solitary waves in an unmagnetized dusty plasma

The effect of higher-order nonlinearity on dust acoustic solitary waves is studied taking into account the dust-charge variation. The model of charge fluctuation, taken here, is of the formI _e+I _i=0,I _e andI _i being the electronic and ionic currents. The dust charge is determined self consistently from the current-balance equation. It is found that the higher-order correction modifies the amplitude and width of the dust acoustic solitary waves. The effect of dust-charge streaming is also discussed.     

[t-Bu2P]3P7 und (t-Bu2Sb)3P7 sowie Untersuchungen zur Bildung von Heptaphosphanen(3) mit PMe2-, PF2- und P(CF3)2-Gruppen

[t-Bu₂P]₃P₇ and (t-Bu₂Sb)₃P₇, as well as Investigations on the Formation of Heptaphosphanes (3) Containing PMe₂, PF₂, and P(CF₃)₂ Groups Tris(di-tert-butylphospha)heptaphosphanortricyclane (t-Bu₂P)₃P₇ 1 obtained by reacting Li₃P₇ · 3 DME with t-Bu₂PF forms yellow crystals. (t-Bu₂Sb)₃P₇ 2 produced similarly from t-Bu₂SbCl and Li₃P₇ · 3 DME didn't form crystals; it decomposes in a solution of toluene above ?10°C. Both compounds were identified by their ³¹P{¹H} NMR spectra, and 1 also by elemental analysis and single crystal structure determination (space group) P2₁/a, a = 1 712.0(9) pm, b = 1 105.1(7) pm, c = 1 854.0(10) pm, β = 94.96(4)°, Z = 4 formula units in the elementary cell). Attempts to synthesize (Me₂P)₃P₇ 3 , (F₂P)₃P₇ 4 and [(F₃C)₂P]₃P₇ 5 failed as dialkylchlorophosphanes as Me₂PCl e. g. with Li₃P₇ · 3 DME react under Li/Cl exchange, dialkylfluorophosphanes (except t-Bu₂PF) disproportionate, and neither PF₃ nor (F₃C)₂PBr with Li₃P₇ · 3 DME give the desired products 4 or 5 , resp.     

The way into the bridge: a new bonding mode of tertiary phosphanes, arsanes, and stibanes

Until recently, tertiary phosphanes, arsanes, and stibanes were considered to bind to transition-metal centers only in a terminal coordination mode. Investigations on the reactivity of square-planar trans-[RhCl(=CRR')(L)(2)] compounds revealed that compounds in which L=SbiPr(3) can be converted upon heating into dinuclear complexes [Rh(2)Cl(2)(micro-CRR')(2)(micro-SbiPr(3))] with the carbene and stibane ligands in bridging positions. Although attempts to replace the stibane in these complexes with a tertiary arsane or phosphane failed, substitution of the chloro ligands for acetylacetonates followed by bridge-ligand exchange allowed the preparation of the phosphane- and arsane-bridged compounds [Rh(2)(acac)(2)(micro-CRR')(2)(micro-PR(3))] and [Rh(2)(acac)(2)(micro-CRR')(2)(micro-AsMe(3))]. The acac ligands can be replaced by anionic Lewis bases to give either monomeric [Rh(2)X(2)(micro-CRR')(2)(micro-ER(3))] or dimeric chain-like [XRh(micro-CRR')(2)(micro-ER(3))Rh(micro-X)(2)Rh(micro-CRR')(2)(micro-ER(3))RhX] molecules.