摘要
以苯胺或对硝基苯胺为起始原料,通过重氮偶合法合成了4种分别含有硝基、氨基和不同数目偶氮基的偶氮苯化合物（1-4）,其结构经^1H NMR和FT-IR确证。研究了1-4在紫外灯（12 W）照射下随时间变化的UVVis谱图。结果表明：含有给电子基团（NH2）偶氮苯的光致异构化速率较含有吸电子基团（NO2）时更快,NO2对分子的异构化有一定抑制作用;分子中偶氮基的数目增加时,顺反异构化过程也受到影响。
Four kinds of azobenzene compounds （ 1 - 4） containing nitro, amino, and different number of azo groups were synthesized by diazo coupling reaction from aniline or 4-nitroaniline. The structures were confirmed by ^1H NMR and F^-IR. The UV-Vis spectra of 1 - 4 under UV irradiation were investigated. The results showed that the photoisomerization rate of the compounds linked with electron-donating group（ NH2 ） was faster than those linked with electron withdrawing group （NO2 ）. The photoisomerization was therefore restrained by NO2. The the number of azo couples. cis/trans isomerization process was also affected by
出处
《合成化学》
CAS
CSCD
2016年第4期338-341,345,共5页
Chinese Journal of Synthetic Chemistry
基金
山东省自然科学基金资助项目(ZR2013EMM017)
关键词
苯胺
重氮偶合法
偶氮苯
合成
光致异构化
aniline
diazo coupling reaction
azobenzene
synthesis
photoisomerization
