预处理条件对Zn/Al-CLM的丙烷芳构化性能的影响

在脉冲微反装置上考察了不同的预处理条件对Zn/Al-CLM催化剂的丙烷芳构化反应的影响。结果表明，丙烷在Zn/Al-CLM催化剂上具有一定的的反应活性和芳烃选择性，而且芳构化主要转化为苯；载体Al-CLM的焙烧温度、金属锌负载量、活化温度等对Zn/Al-CLM催化剂的丙烷芳构化性能具有重要影响。载体经500℃预焙烧制备的Zn/Al-CLM催化剂具有最好的柱结构保留度，从而表现出最佳的芳构化性能；随着锌含量的增加，Zn/Al-CLM催化剂的酸量增大，从而使丙烷转化率增大，而选择性则是锌含量质量分数为5．8％时具有极大值；400℃活化处理可使Zn与Al-CLM之间具有适中的相互作用，从而使得Zn/Al-CLM具有较高的芳烃收率。     

导电高分子材料的应用和进展

论述了复合型及结构型导电高分子材料的导电机理、应用和研究进展。     

丙酮一步法合成甲基异丁基酮催化剂研究

用浸渍法制备了丙酮一步法合成甲基异丁基酮负载型催化剂，考察了载体的预处理温度、添加镧助剂对催化剂性能的影响；用BET法测定了催化剂的表面积；采用H2-O2滴定法测定Pd的分散度．结果发现，用经过1．023K焙烧过的Al2O3为载体的催化剂具有较好的催化性能，添加镧助剂后催化剂的分散度、活性有较大的提高．     

A New and Efficient Synthetic Method and Antibacterial Activities of Oxazolidinone Analogues

A series of novel oxazolidinone analogues were prepared by a new and efficient synthetic method and their antibacterial activities were determined. These compounds wer echaracterized by LC-MS and ^1H NMR.     

[2,4—CH3）2C5H5]2TiCO的合成及结构

合成了开环夹心羰基化合物[2,4-(CH_3)_2C_5H_5]_2GCO,得到了该分子的单晶结构,[2,4-(CH_3)_2C_5H_5]_2TiCO晶体属于正交晶系,P2_12_12_1空间群,晶胞参数a=1.0078(5)nm,b=1.1909(8)nm,c=1.1946(5)nm,b=1.4337(13)nm~3,Z=4,R=0.054。单晶结构表明该分子为平行覆盖型开环夹心化合物,用EHMO方法计算了[2,4-(CH_3)_2C_5H_6]_2TICO的电子结构。     

液膜法分离钒(Ⅳ)的研究

本文用P204-兰113A-煤油组成的滤膜体系处理钒(Ⅳ)的溶液,并考察了表面活性剂、载体、外相pH值、内相酸度、起始钒(Ⅳ)浓度以及乳水比等因素对分离的影响。     

A Novel Dimeric Coumarin from Clausena lenis

A novel dimeric coumarin (1), a dimeric of seselin named diseselin A, was isolated from the aerial part of Clausena lenis. The structure was elucidated based on the MS, 1D and 2D NMR data.     

Preparation and gas separation properties of zeolite T membrane

Zeolite T membranes were synthesized on tubular porous mullite tubes by hydrothermal synthesis. The membranes selectively permeated carbon dioxide from CO2/CH4 and CO2/N2 mixtures with high separation performances, which were due to combined effects of molecular sieving and competitive adsorption.     

Characteristics of electroosmotic flow and migration of neutral solutes under stepwise gradient elution of capillary electrochromatography

A theoretical study on the velocity of electroosmotic flow (EOF) and the retention times of neutral solutes under multiple-step gradient of capillary electrochromatography (CEC) was carried out, focusing on that with three kinds of mobile phases. Through the model computations, the detaining time of the second kind of mobile phase in the column was proved to play an important role in affecting EOF. The variation speed of EOF was shown to be determined by the differences among dead times in different steps. In addition, the prediction of the retention times of 13 aromatic compounds under gradient mode was performed with the deduced equations. A relative error below 3.3% between the calculated and experimental values was obtained, which demonstrated the rationality of the theoretical deduction. Our study could not only improve the comprehension of stepwise gradient elution, but also be of significance for the further optimization of separation conditions in the analysis of complex samples.     

A New 4.0-Generation Dendrimer Phosphorescence Labeling Reagent and Its Application to Determination of Trace Alkaline Phosphatase by Affinity Adsorption Solid Substrate-room Temperature Phosphorimetry

A Triton X-100-4.0G-D （4.0G-D refers to a 4.0-generation dendrimer） was brought forward as a new phosphorescence labeling reagent. Two types of specific affinity adsorption （AA） reactions （direct method and sandwich method） were carried out between the labeling product of Triton X-100-4：0G-D-Wheat germ agglutinin （WGA） and alkaline phosphatase （ALP）, the product of AA reaction preserved the good characteristics of room temperature phosphorescence （RTP） of 4.0G-D and △Ip of the product was proportional to the content of ALP. According to the fact stated above, a new method for the determination of trace ALP by affinity adsorption solid substrate-room temperature phosphorimetry （AA-SS-RTP） was established on the basis of WGA labeled with the Triton X-100-4.0G-D. The detection limits were 0.20 ag·spot^-1 （corresponding concentration： 5.0×10^-16 g·mL^-1, namely 5.0×10^-18 mol·L^-1） for a direct method and 0.14 ag·spot^-1 （corresponding concentration： 3.5×10^-16 g·mL^-1, namely 3.5×10^-18 mol·L^-1） for a sandwich method, respectively. For their high sensitivity, good repeatability and high accuracy, the direct method and sandwich method have been successfully appfied to determine the content of ALP in human serum, and the results were coincided with the clinical detection results of the enzyme-linked immunosorbent assay method by the Zhangzhou Hospital of Traditional Chinese Medicine. Meanwhile, the mechanism for the determination of trace ALP by AA-SS-RTP was discussed.