新型偶氮苯自组装一LB组合有序膜的构造与表征  

Fabrication and Characterization of a Novel Azobenzene SAM-LB Composite Film

作　　者：赵春侠[1] 于化忠[1] 王永强[1] 蔡生民[1] 刘忠范[1] 

机构地区：[1]北京大学化学与分子工程学院智能材料研究中心,北京100871

出　　处：《高等学校化学学报》1997年第2期300-302,共3页Chemical Journal of Chinese Universities

基　　金：国家攀登计划;国家自然科学基金

摘　　要：A novel azobenzene SAM-LB composite film was fabricated by depositing LangmuirBlodgett monolayer of 4-octyl-4’ - (3-carboxy-trimethylene-oxy)-azobenzene (ABD) onto the cysteamine self-assembled monolayer(AET SAM) modified gold substrate. The film stability was greatly improved and the molecular aggregation was effectively prevented by the strong ionic bonding character on the SAM-LB interface, which was evidenced by both contact-angle titration, RA-FTIR and AFM. The reversible tran/cis isomerization and the clear-cut electrochemical response of cis-azobenzene were observed in the presence of highly organized molecular assemblies. This enable us to carry out a kinetic study of the cis-azobenzene in highly organized monolayers, by which a "more" reversible and unique pH dependent electron-transfer kinetic behavior of azobenzene was shown within the novel SAM-LB composite films.A novel azobenzene SAM-LB composite film was fabricated by depositing LangmuirBlodgett monolayer of 4-octyl-4' - (3-carboxy-trimethylene-oxy)-azobenzene (ABD) onto the cysteamine self-assembled monolayer(AET SAM) modified gold substrate. The film stability was greatly improved and the molecular aggregation was effectively prevented by the strong ionic bonding character on the SAM-LB interface, which was evidenced by both contact-angle titration, RA-FTIR and AFM. The reversible tran/cis isomerization and the clear-cut electrochemical response of cis-azobenzene were observed in the presence of highly organized molecular assemblies. This enable us to carry out a kinetic study of the cis-azobenzene in highly organized monolayers, by which a 'more' reversible and unique pH dependent electron-transfer kinetic behavior of azobenzene was shown within the novel SAM-LB composite films.

关 键 词：自组装单分子膜 LB膜 偶氮苯 顺反异构化 

分 类 号：O625.65[理学—有机化学] O484.1[理学—化学]