双偶氮的

Starting from 3-benzoyl-5-formyl-indolizine, 3-benzoyl-5-(2'2'-diacetylethenyl)-indolizines and analogs were obtained by the 〓mediated aldol condensation or Wittig reaction. These compounds,promoted by low-valent titanium, gave highly functionlizedcycl[3,2,2]azine derivatives. The coupling reaction proceeded betweenthe carbonyl group and the carbon-carbon double bond, a rare example inMcMurry reaction.

我们以3-苯甲酰基-5-甲酰基中氮茚为原料，通过三碘化钐促进的aldol反应和Wittig反应制备了3-羰基-5-羰基乙烯基中氮茚，随后经低价钛还原偶联，没有生成正常的分子内羰基-羰基偶联产物，而是得到反常的羰基与α，β-不饱羰基的双键偶联产物，较高收率地得到了含多官能团的CycI[3，2，2]azine衍生物。

The result shows this kind of organic azobenzene has its potential application in photonic devices due to its higher x(3) value , faster response time and optical bistability.

综观本文工作，表明自制的一类偶氮苯有机材料具有较高的／）值、快速的时间响应和光学双稳特性。说明该材料在光子器件方面具有潜在应用前景。

When adsorbed onto a mica surface, it can form close-packed globule-like interface micelles.

我们发现含有偶氮苯介晶基团的双头双亲分子azo-11在云母界面和表面上都可以形成具有很好取向的10nm宽的纳米条带。

The length of certain bond and the number of conjugate double-bond affected OWF〓 greatly, OWF〓 changed linearly with the change of bond length (for planar azobenzene derivatives and cyanine derivatives) and the change of conjugate double-bond number (for conjugate alkene,β-carotene and lycopene).

3键长和共轭双键数对OWF〓有较大的影响，OWF〓随键长（如平面型的偶氮苯衍生物、菁类和氧杂菁类等）和双键数（如共轭烯烃类、β—胡萝卜素和番茄红素等）的变化而线性变化。

The length of certain bond and the number of conjugate double-bond affected OWFπ-π greatly, OWFπ-π changed linearly with the change of bond length (for planar azobenzene derivatives and cyanine derivatives) and the change of conjugate double-bond number (for conjugate alkene, p-carotene and lycopene).

3键长和共轭双键数对OWF_有较大的影响，OWF_随键长(如平面型的偶氮苯衍生物、菁类和氧杂菁类等)和双键数(如共轭烯烃类、β—胡萝卜素和番茄红素等)的变化而线性变化。

It provides a route tothe compounds which contains three functional groups, two carbon-nitrogentriple bonds and one carbon-carbon double bond. In water, metallic indiumpromotes carbon-sulfur bond coupling reaction of aromatic sulfonyl chloride withsuitable organic halides to afford sulfones. In the last chapter, metallic tin mediated allylation of aldimines with allylbromide was revealed.

第三章，我们研究了在水相介质中金属铟促进的烯丙基溴对1，1-二氰基-2-芳基乙烯的Michael加成反应，生成一个含碳碳双键和二个碳氮叁键的三官能团化合物，另外，金属铟在水介质中还可以促进芳基磺酰氯与卤代烃发生碳硫键的偶联，生成砜。

Methods In the medium of H2SO4, the catalytic action of Feon the oxidation of dibromomethyl carboxyazo by KIO4 was effectively inhibited by EDTA with α,α'-dipyridyl as an activator of the reaction.

方法在硫酸介质中，以α，α'-双吡啶为活化剂，Fe催化碘酸钾氧化二溴对甲基偶氮羧的反应可被微量EDTA有效阻抑，被过量EDTA有效终止。

The epoxy-based second-order NLO polymer was synthesized through the coupling reaction between p -nitrophenyl diazonium salt and an epoxy-based precursor polymer,which was prepared by the polycondensation of diglycidyl ether of bisphenol-A and aniline Bi-component (BPAN-lA-NT/M2OS) thin films were prepared by spin-coating from the solution of BPAN-lA-NT mixed with certain amount of a cross linking agent M2OS.

通过双酚A-二与苯胺的逐步聚合反应合成环氧树脂类先驱聚合物BPAN ，进一步通过先驱聚合物的后重氮偶合反应，制备了侧链带偶氮生色团的二阶非线性光学聚合物BPAN-1A-NT。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷