钠的液氨溶液还原炔烃反应机理探讨

根据炔烃及氨合电子的性质,提出炔烃被钠的液氨溶液还原的反应机理,并对产物的构型给予了理论解释。

碱金属液氨溶液特性及第三类导体概念的提出

以“空穴理论”为基本观点,根据有关实验事实,阐述了碱金属液氨溶液的超常导电性、动力学稳定性、Na_(g)-NH_3(?)双组分相图等主要物化特性,在此基础上提出具有电子迁移和离子迁移双重导电性能的金属非水溶液体系为第三类导体的新概念.

溶剂化电子的传奇历史

在科学发展的过程中,存在着大量的基础性实验,它们的进一步发展构成了成熟的学科体系。比较罕见的是,来自不同领域的知识在某一时刻碰撞所产生的火花给以往的成果提供了一个全新的视角,并引发了新一波的研究浪潮。溶剂化电子就是这样的情况,它是一个在液体中孤立且电荷极化的电子,那么,这样一个概念是源自何处呢?

Recovery of copper from simulated ammoniacal spent etchant using sterically hindered beta-diketone

The solvent extraction of copper from simulated ammoniacal spent etchant with 1-（4＇-dodecyl）-phenyl-3-tertiary butyl-1,3-octadione（HR） was studied,and a model of extraction isotherm was proposed and verified with equilibrium extraction constant.The influence of equilibration time,extractant concentration and phase ratio on the extraction of copper was studied at（298±0.5） K.For the spent etching solutions containing 112.98 g/L Cu,6 mol/L NH3 and 1 mol/L NH4＋,the optimal solvent extraction condition of copper was obtained in one-stage solvent extraction at phase ratio of 5：4 with 40% HR in sulphonated kerosene for 5 min.The copper concentration in the raffinate decreased to 63.24 g/L and raffinate can be favorably recycled to the etching solution.The stripping studies were carried out with the simulated copper spent electrolyte containing 30 g/L Cu and 180 g/L H2SO4.The stripping ratio is 98.27% from the loaded organic phase after one-stage stripping at phase ratio of 1：2 at（298±0.5） K.

Measurement and Correlation on Liquid DifFusion Coefficients of Aqueous L-Threonine Solutions from 298.15K to 328.15 K

The diffusion coefficients of aqueous L-threonine solutions were determined from 298.15 K to 328.15 K by the metallic diaphragm cell method with accuracy, promptness and convenience. Meanwhile, the densities and viscosities of the solutions were also determined and correlated. Based on a semi-empirical model for correlating the diffusion coefficients of some amino acids in their aqueous solutions, a new semi-empirical model for correlating the diffusion coefficients involving temperature was provided, which is more comprehensive and less experiment dependent compared to the previous model. The fitting results are satisfactory. Compared to a former model for correlating the diffusion coefficients of solid organic salts in their aqueous solutions, this model provides significant improvement in correlation of diffusion coefficients with different temperatures avoiding arduous work.

Chemical Interaction UO2Cl2 with α-and β-Amino Acids in Aqueous and Organic Solution

This paper presents the results of the search of biologically active uranium compounds such as amino acids. We first received and examined X-ray and IR （infrared radiation） spectroscopy of uranium complexes with α- and β-amino acids in aqueous and organic solution. We proposed a method for direct synthesis of complex organic compounds of uranium chloride UO2Cl2 with α- andβ-amino acids for the synthesis of drugs for the treatment of cancer.

Measurement of Liquid Diffusion Coefficients of Aqueous Solutions of Glycine, L-Alanine, L-Valine and L-Isoleucine by Holographic Interferometry

The diffusion coefficients of aqueous solutions ofglycine, L-alanine, L-valine and L-isoleucine at 298.15 K were determined by holographic interferometry with accuracy and promptness while without disturbance. The density and viscosity of these solutions were also determined. According to original Gordon model, a model for correlating the diffusion coefficients of amino acids in aqueous solutions was developed and applied. The results showed that this model provided significant convenience in correlation of diffusion coefficients for amino acids system.

Research on desorption and regeneration of simulated decarbonization solution in the process of CO_2 capture using ammonia method

Study on desorption and regeneration of simulated decarbonization solution using ammonia method for CO2 capture was car- fled out in order to understand the feature of regeneration of decarbonization solution. The mechanisms about solution desorp- tion after decarbonization were introduced briefly. Under the atmospheric pressure and in the presence of nitrogen carrier gas, several effects related to desorption of simulated decarbonization solution were analyzed, such as temperature, solution con- centration, pH, loading capacity, etc. The results showed that the CO2 desorption percentage increased with the increases of temperature, solution concentration and loading capacity, but CO2 desorption percentage increased with the increasing of pH and then decreased.