金表面偶氮苯自组装膜的光电化学响应  

Photoelectrochemical Behavior of Azobenzene Self-assembled Monolayers on Gold

作　　者：王永强[1] 王健[1] 于化忠[1] 蔡生民 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

出　　处：《高等学校化学学报》1996年第7期1130-1135,共6页Chemical Journal of Chinese Universities

基　　金：国家攀登计划;国家自然科学基金

摘　　要：金表面偶氮苯自组装膜的光电化学响应王永强，王健，于化忠，蔡生民，刘忠范（北京大学化学与分子工程学院智能材料研究中心，北京，１００８７１）关键词偶氮苯，自组装膜，光致异构化，电化学偶氮苯基团特征的光致异构化及电化学响应在分子开关器件和超高密度信息存储等...A novel azobenzene derivative was synthesized and self-assembled into monlayer on gold.The photochromic and electrochemical behavior of thus formed azobenzene SAMs were studied by investigating the different redox properties before or/and after irradiating the film with 350 nm UV light.In the large scan range(-0.6～+0. 5 V),clear-cut electrochemical response of trans-azobenzene/hydrazobenzene was obtained in B-R buffer (0.1mol/L NaClO4, pH:2 ), while no discernible faradic response can be observed in a small scan range(-0.3～+0.5 V).However, after 5 min irradiation of UV light , redox peaks corresponding to cis-azobenzene/hydrazobenzene raised up in the cyclic voltammograrn. Itshould be noted that:(1)The conversion ratio of trans/cis isomerization is very low in thehishly-organized monolayers due to the inhibition of rigid SAMs' structure.(2) The cis-azobenzene is much easier to be reduced than transform, enable the unique'one way hybrid photoelectrochemical cycle' to be available in SAMs as we obtained previously in LB monolayer.

关 键 词：偶氮苯 自组装膜 光致异构化 电化学 

分 类 号：O625.65[理学—有机化学] O644.19[理学—化学]