Coadsorption of 2-mercaptopyrimidine and 2,2′-bipyridine on Au(111) studied by scanning tunneling microscopy

被引：23

作者：

Pinheiro, LS ^{[1
]}

Temperini, MLA ^{[1
]}

机构：

[1] USP, Inst Quim, BR-05599970 Sao Paulo, Brazil

来源：

SURFACE SCIENCE | 1999年 / 441卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

adsorption; 2,2 '-bipyridine; gold; hydrogen bond; mercaptopyrimidine; self-assembly; pi-stacking; STM;

D O I：

10.1016/S0039-6028(99)00785-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Scanning tunneling microscopy (STM) was employed to study the self-assembly of a single layer of 2,2'-bipyridine (22bpy) and also its coadsorption with 2-mercaptopyrimidine (2MPy) on Au(111). STM shows that 22bpy binds on Au(111) vertically through the nitrogen atoms. There is adsorbate-adsorbate interaction in the form of pi-stacking. This interaction leads to the formation of long molecular chains on the surface. The mixed layer of 2MPy and 22bpy on Au(111) is a planar structure. The adsorption mode is very similar to the single layer of 2MPy. The 22bpy molecules lie flat and are attached to one edge of the 2MPy dimer. The 2MPy-22bpy mixed layer is compared to the 2MPy-phen layer. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

引用

页码：45 / 52

页数：8

共 13 条

[1] Scanning tunneling microscopy imaging of small adsorbed molecules on metal surfaces in an ultrahigh vacuum environment [J].