Electrochemical Approach for Constructing a Monolayer of Thiophenolates from Grafted Multilayers of Diaryl Disulfides
作者:Lasse T. Nielsen、Karina H. Vase、Mingdong Dong、Flemming Besenbacher、Steen U. Pedersen、Kim Daasbjerg
DOI:10.1021/ja0682430
日期:2007.2.1
An electrochemical approach is presented for constructing a monolayer or near monolayer of molecules on conducting surfaces by degradation of a multilayer film formed via reduction of aryldiazonium salts. Usually, grafting of surfaces employing aryldiazonium salts results in the formation of intertwined multilayers in a difficult controllable polymerization reaction. However, if the chemical system
提出了一种电化学方法,通过降解芳基重氮盐形成的多层膜,在导电表面上构建单层或近单层分子。通常,使用芳基重氮盐接枝表面导致在难以控制的聚合反应中形成交织的多层。然而,如果选择的化学体系包含可裂解基团,则聚合物网络的后续降解可能允许形成薄的反应性分子层。作为化学系统,选择二芳基二硫化物 (ArSSAr) 的重氮盐来生产表面限制的苯硫酚盐,但将方法扩展到包括其他功能是直接的。苯硫酚盐 (ArS-) 可以可逆地氧化为二硫化物,以在表面建立共价连接的 ArSSAr/ArS-氧化还原对。通过循环伏安法、X 射线光电子能谱和原子荧光法对表面进行分析。