Photophysical Behaviors of Azobenzene in Solvent-Swollen Nafion Membranes

作     者：Guan, JQ Tung, CH 

作者机构：ACAD SINICAINST PHOTOG CHEMBEIJING 100101PEOPLES R CHINA 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：1996年第7卷第10期

页      面：944-947页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

主　　题：Photophysical Behaviors of Azobenzene in Solvent Swollen Nafion Membranes 

摘      要：The fluorescence from azobenzene (AB) molecule incorporated into water-swollen Nafion in acid form was observed at room temperature for the first time. The incorporation process was investigated by UV absorption. The plot of the concentration of AB in Nafion vs. the soaking time shows that the adsorption process is diffusion-controlled, and the apparent diffusion coefficient (D) was determined to be 7.6x10(-10) cm(2)s(-1). These results are attributed to the fact that AB molecules are located in the fluorocarbon/water interface of the Nafion membranes and are protonated. In methanol-swollen Nafion membranes, AB fails to fluoresce because it is located at the methanol pool enclosed by the cluster networks.