Organic Molecular Layer with High Electrochemical Bistability: Synthesis, Structure, and Properties of a Dynamic Redox System with Lipoate Units for Binding to Au(111)
作者:Eisuke Ohta、Hiromitsu Uehara、Ying Han、Kazuhisa Wada、Hidenori Noguchi、Ryo Katoono、Yusuke Ishigaki、Hiroshi Ikeda、Kohei Uosaki、Takanori Suzuki
DOI:10.1002/cplu.201600649
日期:2017.7
synthesized as the first member of a dynamic redox (dyrex) system that can form molecular layers on a Au(111) electrode. Upon the two-electron (2 e) oxidation of 1, the persistent dicationic dye 22+ was generated with the formation of a new C−C bond, which is reversibly cleaved upon 2 e reduction to regenerate 1 (dyrex behavior). Similar dyrex interconversion occurs in the molecular layer of 1 on gold. The chemical
设计并合成了联苯-2,2'-二基双(10-甲基-9-亚甲基ac啶)型电子供体1,该化合物在6,6'-位具有两个连接的环状二硫键单元。可以在Au(111)电极上形成分子层的氧化还原(dyrex)系统。一旦电子两(2 e)氧化的1,持久的双阳离子染料2 2+用一个新的C-C键,其被可逆地在图2e还原裂解的形成产生的再生1(dyrex行为)。在金上的1分子层中也发生了类似的dyrex互变。1 / Au的化学身份和电化学生成的2 2+/ Au通过衰减全反射模式的原位红外光谱确定。在电化学条件下进行原位扫描隧道显微镜(STM),以检查1吸附在Au(111)电极上的表面结构。尽管在1的STM图像中未发现远距有序的形态,但是原位STM对电位诱导的1至2 2+的dyrex反应的STM研究显示,图像中的颗粒斑点变得略微更亮。