Bonding and orientation in self-assembled monolayers of oligophenyldithiols on Au substrates

被引：124
作者：
Azzam, W
Wehner, BI
Fischer, RA
Terfort, A
Wöll, C
机构：
[1] Ruhr Univ Bochum, Inst Phys Chem 1, D-44801 Bochum, Germany
[2] Ruhr Univ Bochum, Inst Anorgan Chem 2, D-44801 Bochum, Germany
[3] Univ Hamburg, Inst Anorgan & Angew Chem, D-20146 Hamburg, Germany
来源：
LANGMUIR | 2002年 / 18卷 / 21期
关键词：
D O I：
10.1021/la020426m
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The structure and orientation within prototype self-assembled monolayers (SAMs) containing aromatic subunits absorbed on Au substrates has been investigated using infrared (IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and scanning tunneling microscopy (STM). Several oligophenyl(di)thiols, namely biphenylthiol (HS-C6H4-C6H5, BPT), biphenyldithiol (HS-C6H4-C6H4-SH, BPDT), biphenyldimethyldithiol (HS-CH2-C6H4-C6H4-CH2-SH, BPDMT), and terphenyldimethyldithiol (HS-CH2-C6H4-C6H4-C6H4-CH2-SH, TPDMT) have been studied. At least one of these molecules, BPDT, has recently been discussed in connection with the fabrication of a simple electronic device using the aromatic oligophenylthiolate SAM as an active component. Our results reveal that organodithiols with a short oligophenyl backbone, that is, BPDT and BPDMT, do not form well oriented layers but demonstrate that longer backbones, for example, a terphenyl unit, do indeed lead to the formation of SAMs with a high degree of molecular orientation.
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收藏
页码：7766 / 7769
页数：4
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