ChemInform Abstract: Ta5+ Displacements in CsTaQ3 (Q: S,Se, and Te): New One-Dimensional Materials with the BaVS3 Structure.

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: Anionic Ordering in Ba15V12S34O3, Affording Three Oxidation States of Vanadium and a Quasi‐One‐Dimensional Magnetic Lattice.

Polycrystalline Ba₁₅V₁₂S₃₄O₃ is prepared by solid state reaction of a 12:3:12:22 molar mixture of BaS, BaO, V, and S under 200 mbar Ar (corundum crucible in sealed quartz tube, 1.     

ChemInform Abstract: Lattice Distortions in Layered Type Arsenides LnTAs2 (Ln: La—Nd,Sm, Gd,Tb; T: Ag,Au): Crystal Structures,Electronic and Magnetic Properties.

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.     

新型微填充柱－毛细管柱二维色谱系统过程的动力学研究

从色谱动力学角度对新型微填充柱－毛细管柱二维色谱系统过程中双柱条件与流出曲线及柱效之间的依赖关系加以系统研究。结果表明：由于双柱条件之间存在关联，双柱系统流出曲线特征与单柱系统存在一定的差异，流出曲线一阶矩和二、三阶中心矩以及双柱系统的柱效皆由预柱和主柱条件综合确定。     

Note on the Net Retention Volume in Chromatography with a Real Gas as a Carrier

The problem of the calculation and interpretation of the net retention volume with a real gas as carrier is revisited. The properties of the carrier are described by a first order virial equation of state. The net retention volume of a solute is related to the mean flow rate of the carrier, therefore determination of the mean flow rate of a real gas carrier is reviewed. It is shown that the mean flow rate cannot be calculated from the mean column pressure. With a real gas carrier the local capacity factor depends on the local pressure of the real gas. The basic relationship between the net retention volume and the function describing this pressure dependence is also reviewed. Precise formulae as well as practical approximations are presented for the calculation of the mean flow rate, of the mean column pressure, and of a representative pressure related to the mean capacity factor.     

Theoretical Studies on the Spin Exchange Interaction in Copper(II) Complexes Coordinated with Nitronyl Nitroxide

In the recent years, a wide variety of transition metal complexes with the nitronyl radical ligands have been reported1,2. These systems display the various magnetic behaviors (ferro- or antiferro-magnetism) between the unpaired electrons on the radical ligands and on the paramagnetic metal ion center. However, few theoretical studies on the metal-radical complexes were reported and quite few are known about the nature of the exchange coupling interactions. In this work, we are interested i…     

ChemInform Abstract: Effect of the Framework Flexibility on the Centricities in Centrosymmetric In2Zn(SeO3)4 and Noncentrosymmetric Ga2Zn(TeO3)4.

Crystals of In₂Zn(SeO₃)₄ (I) and Ga₂Zn(TeO₃)₄ (II) are prepared by solid state reaction of ZnO, In₂O₃ or Ga₂O₃, and SeO₂ or TeO₂ (silica tubes, 600—700 °C, 48 h).     

直流等离子体离子化检测器的研究：管道煤气中可燃气体的测定

本文提出一种改进的直流等离子体离子化检测器（ＤＣＰＩＤ），用于管道煤气中可燃气体Ｈ２、ＣＨ４和ＣＯ的测定。采用氢气作工作气体，对该检测器的工作参数和响应特性进行了优化。本法结果与微波诱导等离子体离子化检测器（ＭＩＰＩＤ）的结果作了比较，结果满意。     

ChemInform Abstract: Preparation of Zeolite ZSM-5 Membranes by in situ Crystallization on Porous α-Al2O3.

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.     

顺磁共振波谱研究辐照异相成核结晶PA1010俘陷自由基的转变

本文通过异相成核剂改变ＰＡ１０１０的结晶表面积，从而使ＰＡ１０１０的微晶结构发生改变。利用顺磁共振方法讨论γ－辐照不同微晶结构的ＰＡ１０１０的俘陷自由基的转变行为。