溶胶-凝胶法制备铁酸盐超微粒子催化剂

采用溶胶－凝胶法制备了含Zn,Ni,Co的铁酸盐超微粒子催化剂，运用DTA－TG、IR、XRD以及BET比表面测试等手段对所制备的样品进行了表征。同时，考察了铁酸盐对二氧化碳选择性氧化乙苯制苯乙烯的催化性能。结果表明：制备的铁酸盐均为尖晶石型晶体，粒子的比表面积为31．9－36．3m^2/g，晶粒大小约为30－35nm，在由二氧化碳选择性氧化乙苯制苯乙烯的反应中表现出较好的催化活性。     

SYNTHESIS OF POLYACETYLENE BY NOVEL CATALYSTS COMPOSED OF TRANSITION METAL 2-ETHYL HEXYL PHOSPHONATES AND ALUMINIUM TRIALKYLS

Polyacetylene is the most hopeful electrical conductive polymer, which is being exploited to fabricate plastic battery, solar energy cell etc. The catalysts used for the synthesis of high cis-polyacetylene films are mainly Ti(OC_4H_9)_4-AlEt_8 and rare-earth coordination catalysts as well as Co(NO_3)_2-NaBH_4. This paper reports features of acetylene polymerization by novel catalysts composed of transition metal 2-ethyl hexyl phosphonates of the fourth periodic transitional series-Ti, V, Cr, Mn, Fe, Co, Ni and aluminium trialkyls. Except Ni catalyst system, all catalytic systems can promote polymerization of acetylene at room temperature to form a silvery-grey polyacetylene film with rich cis-content and high crystallinity. Under the experimental conditions tested, the catalytic activity of various systems shows the following sequence: Fe>Ti～V>Cr>Mn>Co>Ni The polyacetylene films obtained were characterized.     

纳米级碳导电剂的种类对licoo2电化学性能的影响

碳纳米管;锂离子电池;正极;倍率容量;导电剂     

立体专一性地合成（Z）-α-氟-β-三氟甲基乙烯基碘化物和应用于合成多氟噻吩基双烯烃

The direct iodination of polyfluorinated vinyl stannanes by tin-iodine exchange methodology was achieved giving （Z）-α-fluoro-β-trifluoromethyl vinyl iodides stereospecifically. Changing the substituent in R group from the electron-withdrawing group to electron-donating group led to an increase in the yield from 78% to 90%, while it was moved from para to meta position the reaction did not afford a dramatic change in the yield （90% to 95%）. In addition, this reaction also can be applied to the vinyl stannane with heterocyclic group. The further coupling reaction of prepared vinyl iodide containing heterocyclic moiety with （Z）-α-fluoro-β-trifluoromethylstannanes gave polyfluorinated heterocyclic alkadienes with 2E,4E-selectivity.     

8-氯-5,6-二氢-11H-苯并[5,6]环庚烷并[1,2-b]吡啶-11-酮的合成工艺研究进展

8-氯-5,6-二氢-11H-苯并[5,6]环庚烷并[1,2-b]吡啶-11-酮是合成氯雷他定、地氯雷他定、卢帕他定等第二代抗组胺药的重要中间体。本文对其合成方法进行了综述。     

浙江大学基础化学实验研究生助教的实践和探索

研究生助教是对研究生自身能力的培养和锻炼,同时也补充了本科教学教师资源。提高本科教学的质量,需要加强对研究生助教的培训、指导、管理和考评,也需要加强课程教学的统一规范管理,加强对学生学习的督促和引导。本文探讨了基础化学实验研究生助教的教学经验,并对今后实验教学管理以及研究生助教的培养等提出一些思考和建议。     

中国移动回归A股由“时机”决定

中国移动准备回归已经不是一年两年的事情了，只不过我们的证券市场已经走了一个轮回，而它的回归还没有确定的期限。这里面有很多原因，比如资本市场的原因、法律法规的原因等，但笔者认为这都不是重点，根本原因还是中国移动自身对回归的迫切性要求不很强烈，监管层对于其回归的要求不够强烈，可以说中国移动的回归更多的是市场要求，而不是自身要求。     

新年贺词

冬去春来,万物复苏,春潮涌动。值此新年伊始之际,我们谨代表中国半导体行业协会集成电路分会、江苏省半导体行业协会理事会,向各会员单位、产业链关联单位的同仁和全体员工;向关心和支持我分会(协会)工作的各级领导、专家学者、厂商巨贾致以新春最美好的祝贺。     

卫星临时业务自动监测管理系统设计

临时业务监测针对卫星上大量临时突发业务进行实时分析和监测。遇到突发事件或存在非法干扰时。立刻提示相关人员处理。本文设计并实现了卫星临时业务自动监测系统来提高卫星通信管理的自动化水平，确保卫星传输的安全。避免重大事故和经济损失的发生。阐述了系统结构设计、系统软硬件配置和关键技术的实现方案。