Zur Empfindlichkeit von Festkörperspurdetektoren

Es werden verschiedene Festkörperspurdetektor-Materialien hinsichtlich ihrer Empfindlichkeit gegenüber Bestrahlung mit α-Teilchen und zum Teil auch gegenüber Protonen und Deuteronen verglichen. Die speziell für den Einsutz als Festkörperspurdetektor hergestellten Zellulosenitrat-Folien wurden als empfindlichste Detektoren ermittelt.     

Heterocyclization of amino alcohols into saturated cyclic quaternary ammonium salts

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对位取代酚钾与10′10′-二烃基-9,9′-联二吖啶盐电荷转移光谱的研究

10,10′-二烃基-9, 9′-联二吖啶盐有很强的荧光, 在光学材料^[1]和重金属离子的分析^[2]中有重要的应用价值。     

在线样品前处理大体积进样离子色谱法直接测定海水中亚硝酸盐、硝酸盐和磷酸盐

采用戴安公司谱睿(Pre)在线样品除氯技术,结合OnGuard Ba柱去除硫酸盐,建立了离子色谱直接测定海水中亚硝酸盐、硝酸盐和磷酸盐的方法。该方法以IonPac AG23为富集柱,高容量IonPac AS23为分离柱,淋洗液自动发生装置在线产生KOH溶液进行梯度淋洗,抑制电导检测。实验结果表明: 样品稀释5～10倍时,直接进样不会干扰目标物测定。当流速为1 mL/min、进样量为500 μL时,海水中NO~2-N、NO~3-N、PO3~4-P的方法检出限分别为0.3、0.4、0.2 μg/L,线性范围分别为10～500 μg/L、14～680 μg/L、3.4～170 μg/L,线性相关系数r均大于0.9990。测得人工海水样品中目标物的加标回收率为92%～106%,相对标准偏差(RSD, n=6)为1.2%～7.7%。该方法一次进样可在13 min内完成分析,具有操作简单快捷、无污染等优点,能满足近海海水中NO~2、NO~3、PO3~4的定量分析要求。     

Modelisation Des Nappes De Solubilite Du Diagramme De Phases Mg(NO3)2–Al(NO3)3–H2O

A program has been written to describe solubility surfaces of the polythermal ternary phase diagram Mg(NO₃)₂–Al(NO₃)₃–H₂O, using the model proposed by Cohen-Adad et al. [2]. In this work we present the calculation of the solubility surface of Mg(NO₃)₂×6H₂O and Al(NO₃)₃×9H₂O in the phase diagram. The calculated isothermal sections are in a good agreement with experimental determinations. Coefficients of the fitting equation that describes the solubility field allow drawing any isothermal section. The monovariant line was also calculated. The chosen model is well adapted to calculations of these solubility surfaces and gives very good results. This revised version was published online in August 2006 with corrections to the Cover Date.     

稀土—罗丹明配合物的合成和性质的研究

本文报道12种稀土(Y、La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Er、Yb)—罗丹明B的固体配合物制备,通过元素分析、溶解度及摩尔电导测定、差热热重分析、X-射线衍射、红外、紫外、可见、荧光光谱以及~1HNMR谱等对它们的配位作用和性质进行了研究。     

Characterization and Crystal Structure of a New Holmium(Ⅲ) Complex with the Macrocyclic Ligand Derived from 2,6-Dfformyl-4-methylphenol and Diethylenetriamine

The title compound (13,27-dimethyl-3,6,9,17,20,23-hexaazatricyclo-[23.3.1.111,15]-triaconta- 1 (29),2,9,11,13,15(30), 16,23,25,27-decaene-29,30-diol-N3,N6,N9,O29,O30)-bis(nitrato-O,O')-holmium(Ⅲ) nitrate hydrate has been prepared and characterized by elemental analysis, infrared spectra, and electrospray mass spectra. Its crystal and molecular structures were determined by X-ray diffraction methods. The crystal crystallizes in the monoclinic system, space group C2/c with a = 23.737(12), b = 14.237(7), c = 19.801(10) (A), β = 91.36(1)°, Mr = 831.57, V = 6690(6) (A)3, Z = 8,Dc = 1.651 g/cma, F(000) = 3344, R = 0.0482 and wR = 0.0923. The holmium ion is located in one of the compartments of the macrocyclic ligand and presents a distorted tricapped trigonal prismatic coordination geometry. The macrocycle is coordinated with two oxygen and three nitrogen atoms.Two nitrates are chelated in the opposite positions of the macrocycle, and the third one is ionic.     

Refractive indices of a molten ternary nitrate system from 218 to 400°C

Refractive indices of a certain molten nitrate mixture measured goniometrically with visible light at nine wavelengths, varied linearly with temperature at a given wavelength. Dispersion phenomenon was also observed at a fixed temperature. Electronic polarizability was determined using the refractive index extrapolated to infinite wavelength and the semiclassical Clausius-Mossotti equation.     

FT far-IR investigation of rare earth nitrates in non-aqueous solution

The Fourier far infrared spectra of 14 lanthanide and yttrium nitrates in ethyl alcohol, dimethyl formamide and propylene carbonate have been investigated. From the subtraction spectra, a new broad band in the range of 190–260 cm^–1 was observed for each solution, these bands are assigned to Re³⁺-O (solvent oxygen) stretching vibration.