含偶氮苯基团的光敏型两亲化合物的合成及光照对其性质的影响  

Preparation of the Photosensitive Amphiphilic Compound Having an Azobenzene Group and the Effect of the Light Illumination on Its Properties

作　　者：晁俊杰 姜小明[1] CHAO Junjie;JIANG Xiaoming(Department of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,Guizhou,P.R.China)

机构地区：[1]贵州大学化学与化工学院,贵州贵阳550025

出　　处：《影像科学与光化学》2020年第4期615-620,共6页Imaging Science and Photochemistry

基　　金：中低品位磷矿及其共伴生资源高效利用国家重点实验室开放基金项目(WFKF2018-05)。

摘　　要：以对甲基苯胺和苯酚为主要原料,通过四步反应合成了一种含偶氮苯的光敏型两亲化合物AS,其结构用1H NMR进行表征,并利用紫外吸收光谱研究了AS的光异构化,结果表明,在紫外光照射后,AS的结构由反式构型变为顺式构型。测定了化合物AS在水溶液中表面张力,计算相应的物化参数,发现紫外光照射后AS的临界胶束浓度(cmc)增加,最小表面张力(γcmc)增大,饱和吸附量(Гmax)减小,最小分子横截面积(A min)变大。测定了AS溶液在石英表面的接触角,发现紫外光照射后接触角减小,AS对石英的润湿性能增强。利用石英晶体微天平(QCM-D)研究了化合物AS在石英表面的吸附过程,发现紫外光照射后AS在石英表面的吸附量减小,吸附膜厚度降低。A photosensitive amphiphilic compound(AS),which has an azobenzene group,was synthesized using p-methylaniline and phenol as the start material in four steps.Its structure was characterized by 1H NMR.The photoisomerization of the compound was studied by ultraviolet absorption spectroscopy.The results show that the structure of AS is changed from the trans-conformation to the cis-conformation after UV irradiation.The surface tension of AS was measured in the aqueous solution and the corresponding physicochemical parameters were calculated.The results show that after UV irradiation the values of cmc andγcmc increase,Гmax decreases,and A min increases.The contact angle of the AS solution was measured on the quartz surface.The results show that the contact angle decreases after UV irradiation,and the wetting properties of AS is increased on the quartz surface.The adsorption process of AS was studied on the quartz surface by QCM-D.The results show that the amphiphilic molecule can adsorb onto the quartz surface to form a rigid film.After UV irradiation,the adsorption mass of AS is decreased on the quartz surface and the thickness of the adsorption film is decreased.

关 键 词：偶氮苯 两亲化合物 石英晶体微天平 表面性质 吸附 

分 类 号：O647.3[理学—物理化学]