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

doi:10.7517/issn.1674-0475.200402

Abstract

Abstract: 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 and γ_cmc increase,Г_max 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.

Key words: azobenzene, amphiphilic compound, QCM-D, surface properties, adsorb

CHAO Junjie, JIANG Xiaoming. Preparation of the Photosensitive Amphiphilic Compound Having an Azobenzene Group and the Effect of the Light Illumination on Its Properties[J]. Imaging Science and Photochemistry, 2020, 38(4): 615-620.

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