苯并

It was found that the thermodynamically unfavourable isomerization of quadracyclane to norbornadiene could be accomplished in the presence of toluene or durene as a co-sensitizer.

首次发现在甲苯、杜苯等芳烃共敏化下，可以使原来不能进行的、热力学不利的四环烷→降冰片二烯异构化得以进行，并根据CIDNP结果提出这是由于生成了敏化剂/底物/芳烃三元基激络合物使反应的势能面改变造成的并促进单线态的系间窜跃。

Starting with commercial available tosylmethyl isocyanide and but-2-enoic methyl ester, pyrrolo[2,1-f][1,2,4]triazine derivatives was prepared by twelve-steps process in total yiled of 5.0%~8% via pyrrole and pyrrolo [2,1-f] [1,2,4] triazine ring formation, substitution and amination reactions etc.

本文以简单的对甲基苯磺酰甲基乙腈和反-2-丁烯酸为原料，经过形成吡咯，吡咯并[2，1-f][1，2，4] 三嗪环，取代，酰胺化等等12步反应，合成了结构新颖的吡咯并[2，1-f][1，2，4] 三嗪衍生物，总收率达5%～8%。

By dehydrochlorination reaction the poly[(2-methoxyl-5-octyloxy)phenylene vinylene] is synthesized and the material"s structure is characterized by nuclear magnetic resonance spectroscopy, infrared absorption spectrum, ultraviolet and visible spectrophotometry. At the meantime, the fluorescence spectrum is measured and the mechanism of fluorescence occurring is analyzed. Thermal Gravimetric Analyzer"s results show that the MO-PPV"s thermal stability is fine. Also the experiment of resolvable property indicates that the MO-PPV can well dissolve in chloroform. Through analyzing the film"s surface by Metaloscope and Atomic Force Microscope, the good filming is found.

通过脱氯缩合法合成了聚(2-甲氧基-5-辛氧基)对苯乙炔，并分别用核磁共振波谱法、红外吸收光谱法、紫外-可见分光光度法等对其进行了结构表征；测量了样品的荧光光谱，分析了荧光产生的机理；热失重仪分析了材料的热稳定性，研究表明MO-PPV材料具有良好的热稳定性；溶解性实验发现材料在氯仿中溶解性较好；金相显微镜和原子力显微镜研究了薄膜的表面形貌，发现该材料的成膜性良好；材料的导电性研究表明，固体材料在掺杂下才可以表现出导电特性，而配成溶液的材料导电性因溶剂的不同而不同，并随溶解时间的长短发生变化。

Polyacence, polypyridinopyridine and paracyanogen molecules have been studied by using quantum chemistry MNDO, 1D tight-binding CNDO/2-CO methods.

采用MNDO、一维紧束缚CNDO/2 CO方法研究聚并苯、聚并吡啶及多聚氰的分子结构，揭示结构稳定性和电荷分布的变化规律。

In this paper, a series ofmodel compounds of PPV--M-PPVs were synthesized. All of the M-PPVscontained two bridge double bonds that connect the phenyl rings. The research ontheir photooxidative degradation of the M-PPVs including mechanism and kineticswas systemetically conducted.

本文设计合成了一系列含有两个桥双键的聚对苯撑乙烯的模型化合物，并对它们的光氧化降解反应与氧化机理进行了深入系统的研究，并探讨了M-PPV在不同微环境下的发光性质，主要结果如下：一。

A series of pyridazino[3,2-c]1,2,4-triazoles were synthesized from hydrazides and 3-aryl-6- chloro pyridazine s (3a～3d), which were obtained from substituted benzene and succinic anhydride by Friedel-Crafts reaction, cyclization with hydrazine hydrate, dehydrogenation and chloro-substitution.

以取代苯和丁二酸酐为起始原料，经Friedel-Crafts反应，肼合环，Br2/HOAc氧化脱氢后得到一系列1，6-二氢-3-芳基-6-哒嗪酮(2a～2d)。然后将2a～2d与PCl5在POCl3中回流，得到相应的氯代产物3a～3d，将其与酰肼作用，合环后得到一系列未见报道的哒嗪并[3，2-c]1，2，4-三唑类化合物。所有化合物结构均经元素分析，IR，1HNMR和MS谱得以证实，并对其波谱性质进行了讨论

Companies as a benchmark by the Pearl River Delta region, and actively develop new markets, operational radiation throughout the country, and with the domestic and international large-scale plastics manufacturer has established long-term and good cooperative relations, the main proxy Sinopec, Taiwan chemistry, Taiwan Chimei brand has ABS Products resin, HIPS plastic shatterproof, GPPS through benzene, PP demolition hundred plastic, LLDPE Injection, PC, POM, PMMA, PA6, PA66, engineering plastics and LCP, PC + ABC, PBT special engineering materials, and run TPE, TRP, SEBS, SBS, rubber and other raw materials.

公司经珠三角地区为基准，积极开拓市场，业务辐射全国，并与国内外大型塑胶生产商建立了长期及好的合作关系，主要代理中国石化，台湾化学，台湾奇美的品牌，产品有ABS树脂、HIPS不碎胶、GPPS透苯、PP 百拆胶、LLDPE注塑、PC、POM、PMMA、PA6、PA66、工程塑胶和LCP、PC+ABC、PBT特种工程料，并兼营TPE、TRP、SEBS、SBS、等橡胶原料。

The experimental results show that the molar ratio of carbon monoxide to carbon dioxide in the reacting mixture is frequently equal to unity hence the reaction scheme may be stoichiometrically represented as follows

实验证明：反应气体中一氧化碳与二氧化碳的摩尔比接近于1；苯氧化生成顺酐的反应是并串联反应，各反应级数均为准一级；并求出了各反应的活化能和指前因子。

Here we report the cloning, expression, purification and activity assay of Phenylalanyl-tRNA synthetase from Trypanosoma brucei in Escherichia coli host.

本研究用大肠杆菌成功克隆表达并纯化了布氏锥虫苯丙氨酰-tRNA合成酶并进行了活性测定。

A chiral phase transfer catalyst, N-benzyl quinine bromide, was synthesized from natural chiral compound. And 2,5-bimethyl-4-(3-nitrobenzene)-1,4-bihydrogenation pyridine-3--4-methyl formate (viz. nitrendipine) was synthesized by this chiral phase transfer catalysis, and characterized by elemental analysis, infrared spectrum,1H nuclear magnetic resornace, and X-ray single-crystal diffraction.Key words: ammonium; chiral phase transfer catalyser; crystal structure

通过对天然手性物质进行修饰合成手性相转移催化剂N-苄基溴化奎宁，并对目标分子2，5-二甲基-4-(3-硝基苯)-1，4-二氢吡啶-3-甲酸乙酯-5-甲酸甲酯进行不对称催化合成，并通过红外光谱和核磁共振氢谱对化合物进行了表征，用X射线单晶衍射法测定了该化合物的晶体结构。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。