新型偶氮苯自组装一LB组合有序膜的构造与表征

偶氮兹及其衍生物具有独特的光致异构化和电化学反应机制,其LB单分子膜作为一种高度有序的分子组装体系,以其诱人的应用前景引起了人们的极大兴趣．然而在这方面的研究中,LB膜通常是沉积在SnO。或镀金的基片上,其结构的相对木稳定性限制了实际应用的可能性．我们利用自组装技术,在金基底表面组装了具有特定末端基团的自组装单分子膜,然后利用LB技术构造偶氮苯衍生物的单分子膜,以期得到稳定而有序的偶氮苯LB膜,且不影响其光化学和电化学活性．本文报道了这种新型偶氮苯自组装一LB组合股的结构表征及其电化学行为．亚实验部分偶…

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

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.