查询词典 vinylene

As compared to the l max absorption of regioregular poly(3-alkylthiophene)s (RR-P3ATs), the red-shift about 120 nm for RR-P3ATVs resulted from the more coplanarity and the longer conjugation length due to the additional vinylene linkage introduced to the conjugated chains.

与立体规则性聚(3-烷基噻吩)(RR-P3ATs)比较， RR-P3ATVs 之 UV-vis 最大吸收波长约有120 nm 的红外移，显示共轭主链导入乙烯基后，有较佳的共平面性与较长的共轭长度。

The same calculations are also carried out for several other typical linear conjugated molecules poly(phenylene vinylene, poly, polythiophene, and polyphenylene molecules and similar results as those of the PA are obtained.

对一系列其它类型的线型π-共轭分子聚对苯撑乙炔(PPV、聚苯乙炔、聚噻吩和聚苯进行了类似的计算研究，也得到了相同的结果。

Multi block copolymer poly p phenylene vinylene co poly(ethylene oxide(PPVEO200 and PPVEO600) was synthesized by Wittig reaction.

通过经典的Wittig反应，成功合成了聚对苯亚乙烯和2种分子量聚氧化乙烯的多嵌段共聚物(PPVEO200和PPVEO600)。

Syntheses of PPVs derivatives with alkoxyl as side-chain by the method of dehalogenating condensation reaction Those PPV derivatives, named poly (2-methoxy-5-alkoxyl) phenylene vinylene,containing alkoxyl on benzene ring, were placed on emphasis in this paper.

一。通过强碱诱导的去卤缩合法合成支链含不同烷氧基的PPV衍生物本文首先重点研究了支链中含不同链长烷氧取代基的PPV衍生物：聚(2-甲氧基-5-烷氧基)对苯乙炔。

The most parts of thesis as follows:1. Five symmetrical intra-molecular charge transfer oligomeric phenylene vinylene light emitting materials were designed and synthesized using oligomeric phenylene vinylene as a framework.2. The structures of target molecule were characterized by ~1HNMR,~(13)CNMR, IR, MS and element analysis.3. In order to study the influence of the location and numbers of electron-donor and electron-acceptor on their photoelectric performance by changing length of OPV chain, the UV spectra and fluorescence spectra of target compounds has been compared. We have researched into main factors effecting on material emitting red-shift; organic electroluminescence device was prepared using the compound P4. The capability of eletroluminescence was researched.4. The photoelectric properties of P4 was explained by quantum chemical calculation (the Gaussian 98 quantum chemistry program). It is greatly contributed know the whole process of charge transfer to guide the design of red emitters.

本文研究的内容主要包括以下部分：(1)设计并合成5个对称的以齐聚苯乙烯类为骨架的分子内电荷转移型齐聚苯乙烯类发光材料；(2)通过IR，MS，~1H-NMR，~(13)C-NMR和元素分析对所合成的目标化合物进行表征；(3)通过对目标化合物的紫外光谱和荧光光谱比较分析，研究改变OPV的长度，电子给体和电子受体的位置及数量对其光电性能的影响，探讨材料发射红移的主要因素；选取性能良好的目标化合物P4制备成OELD器件，对其电致发光性能进行研究；(4)运用Gaussian98量子化学程序包，采用量子化学方法对目标化合物P4的光电性能从理论加以解释，进一步认识荷移跃迁的整个过程，为红光材料的设计加以指导。

Monochloroethylene carbonate is prepared by chlorination of ethylene carbonate with sulfuryl chioride ,a solution of monochloroethylene carbonate in ethylene carbonate is reacted with triethylamine to give vinylene carbonate.A parameter design method was applied to select the optimum synthesis conditions.63.3％ and 78％ yields superior to the conventional for monochloroethylene carbonate and vinylene carbonate were obtained respectively,and the process was also simplified .

以碳酸乙烯酯为原料，用磺酰氯作为氯化剂生成一氯代碳酸乙烯酯，三乙胺为脱卤化剂在碳酸乙烯酯溶剂中合成碳酸亚乙烯酯，对一氯代碳酸乙烯酯和碳酸亚乙烯酯制备的工艺参数进行优化，收率分别达到63.3％和78％，均超过了传统方法，且简化了工艺，缩短了反应时间，易于工业化生产。

Four soluble poly(p-phenylene vinylene) derivatives with asymmetric alkoxyl substituents, poly (2-methoxy-5-butoxy)-p-phenylene vinylene, poly [2-methoxy-5-(3'-methyl)butoxy]-p-phenylene vinylene, poly (2-methoxy-5-hexyloxy)-p-phenylene vinylene and poly (2-methoxy-5-octoxy)-p-phenylene vinylene, were prepared by dehydrochlorination reaction with using p-hydroxyanisole and alkyl bromide as raw materials.

以对羟基苯甲醚和溴代烷烃为原料，采用强碱诱导的脱氯化氢缩合聚合法合成了四种可溶性不对称烷氧基取代聚对苯乙炔衍生物，分别为聚（2-甲氧基－5-丁氧基）对苯乙炔、聚［2-甲氧基－5-（3'-甲基）丁氧基］对苯乙炔、聚（2-甲氧基－5-己氧基）对苯乙炔和聚（2-甲氧基－5-辛氧基）对苯乙炔。

On the basis of the summarization and review on the researches and developments of the third-order optical nonlinear materials, the third-order optical nonlinearities of poly(l,4-phenylene vinylene) derivatives and metalloorganic compounds as well as the optical switching effects of poly(l,4-phenylene vinylene) derivatives are investigated.

在总结和回顾前人对三阶非线性光学材料研究的基础上，合成并研究了聚(1，4-苯亚乙烯)及其衍生物以及金属有机化合物的三阶光学非线性，同时对PPV及其衍生物的光开关特性进行了初步研究。

Other Titles: Synthesis and characterization of poly(2,3- diphenyl-1,4-phenylene vinylene) derivatives and composites poly(1,4-phenylene vinylene)/oxide nanoparticles.

Title：聚-(2，3-双苯基-1，4-仲苯基乙烯)之衍生物及聚-(1，4-仲苯基乙烯)/氧化物奈米颗粒之复合材料之合成与鉴定。

This dissertation presents the effects of formation potential range, heat treatment, and the thermal additive, vinylene carbonate, on the formation and stability of SEI by electron spectroscopy for chemical analysis, fourier transform infrared spectroscopy, differential scanning calorimetry, nuclear magnetic resonance, AC impedance, and certain standard electrochemical techniques.

因此，本论文从三方面著手，分别探讨化成程序的电位范围、热处理、以及热添加剂乙烯碳酸酯（vinylene carbonate；VC）对此钝化层造成的影响。所采用的分析工具包括X光线电子光谱、富利叶红外光谱、差分扫瞄式卡计、核磁共振光谱、交流阻抗频谱及一些标准的电化学分析技术。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。