Structure evolution of aromatic-derivatized thiol monolayers on evaporated gold
Structure evolution of aromatic-derivatized thiol monolayers on evaporated gold
复制标题
DOI：
10.1021/la9700984
复制
发表时间：
1997-07-23
期刊：
影响因子：
3.9
通讯作者：
Chen, CH
中科院分区：
文献类型：
--
作者：
Tao, YT;Wu, CC;Chen, CH
用循环伏安法、反射吸收红外光谱、扫描隧道显微镜、椭圆偏振光谱和接触角测量等方法比较了苯硫酚（I）、苄硫醇（II）、联苯硫酚（III）和4-联苯甲硫醇（IV）在Au（111）表面自组装膜的结构。结果表明，苄硫醇和4-联苯基甲硫醇形成紧密堆积和有序的单分子层，而不考虑对烷氧基取代基的长度。对于苯硫酚和联苯硫醇，形成较低表面覆盖度的膜。一个长的p-烷氧基链（n-C16 H33 O）增加了分子间的相互作用，并导致在单层膜内的更紧密的包装。这种差异归因于分子间相互作用和硫醇头基上的键角偏好之间的相互作用。
The structure of self-assembled monolayers of thiophenols (I), benzyl mercaptans (II), biphenylthiols (III), and 4-biphenylmethanethiols (IV) on the surface of Au(111) are compared using cyclic voltammetry, reflection absorption infrared spectroscopy, scanning tunneling microscopy, ellipsometry and contact angle measurement. The results suggest that benyzyl mercaptans and 4-biphenylmethanethiols form closely packed and ordered monolayer, irrespective of the length of a p-alkoxy substituent. For thiophenol and biphenylthiol, a film of lower surface coverage was formed. A long p-alkoxy chain (n-C16H33O) increases the intermolecular interaction and leads to a closer packing within the monolayer film. The difference is attributed to the interplay between intermolecular interaction and the bond angle preference at the thiolate head group.