Polymorphism in biphenyl-based self-assembled monolayers of thiols

被引：72

作者：

Cyganik, P ^{[1
]}

Buck, M ^{[1
]}

机构：

[1] Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2004年 / 126卷 / 19期

关键词：

D O I：

10.1021/ja049146e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Self-assembled monolayers of ω-(4′-methylbiphenyl-4-yl) butanethiol (H3C-C6H4-C6H4-(CH2)n-SH) on Au(111) substrates were investigated with scanning tunneling microscopy and contact angle measurements. A striking polymorphism was observed upon annealing, and structural changes were paralleled by a switch in stability against exchange by other thiols from unstable to stable. The phase formed at temperatures above 413 K was characterized by a very high structural perfection over areas exceeding 105 nm2. The results suggest an additional dimension in the control of structure and properties of thiol monolayers if different factors contributing to the energetics of SAMs enter in a competing rather than a cooperative way. Copyright © 2003 American Chemical Society.

引用

页码：5960 / 5961

页数：2

共 21 条

[1] Charge transfer on the nanoscale: Current status [J].

Adams, DM ;

Brus, L ;

Chidsey, CED ;

Creager, S ;

Creutz, C ;

Kagan, CR ;

Kamat, PV ;

Lieberman, M ;

Lindsay, S ;

Marcus, RA ;

Metzger, RM ;

Michel-Beyerle, ME ;

Miller, JR ;

Newton, MD ;

Rolison, DR ;

Sankey, O ;

Schanze, KS ;

Yardley, J ;

Zhu, XY .

JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (28) :6668-6697

[2] Pronounced odd-even changes in the molecular arrangement and packing density of biphenyl-based thiol SAMs:: A combined STM and LEED study [J].

Azzam, W ;

Cyganik, P ;

Witte, G ;

Buck, M ;

Wöll, C .

LANGMUIR, 2003, 19 (20) :8262-8270

[3] Coexistence of different structural phases in thioaromatic monolayers on Au(111) [J].

Azzam, W ;

Fuxen, C ;

Birkner, A ;

Rong, HT ;

Buck, M ;

Wöll, C .

LANGMUIR, 2003, 19 (12) :4958-4968

[4] Bonding and orientation in self-assembled monolayers of oligophenyldithiols on Au substrates [J].

Azzam, W ;

Wehner, BI ;

Fischer, RA ;

Terfort, A ;

Wöll, C .

LANGMUIR, 2002, 18 (21) :7766-7769

[5] Structure and stability of tilted-chain phases of alkanethiols on Au(111) [J].

Barrena, E ;

Ocal, C ;

Salmeron, M .

JOURNAL OF CHEMICAL PHYSICS, 2001, 114 (09) :4210-4214

[6] Self-assembled monolayers of ω-biphenylalkanethiols on Au(111):: Influence of spacer chain on molecular packing [J].

Cyganik, P ;

Buck, M ;

Azzam, W ;

Wöll, C .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (16) :4989-4996

[7] Conductance switching in single molecules through conformational changes [J].

Donhauser, ZJ ;

Mantooth, BA ;

Kelly, KF ;

Bumm, LA ;

Monnell, JD ;

Stapleton, JJ ;

Price, DW ;

Rawlett, AM ;

Allara, DL ;

Tour, JM ;

Weiss, PS .

SCIENCE, 2001, 292 (5525) :2303-2307

[8] Electrochemical and exchange studies of self-assembled monolayers of biphenyl based thiols on gold [J].

Felgenhauer, T ;

Rong, HT ;

Buck, M .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2003, 550 :309-319

[9] Self-assembled monolayers composed of aromatic thiols on gold: Structural characterization and thermal stability in solution [J].

Garg, N ;

Carrasquillo-Molina, E ;

Lee, TR .

LANGMUIR, 2002, 18 (07) :2717-2726

[10]

Gölzhäuser A, 2001, ADV MATER, V13, P806, DOI 10.1002/1521-4095(200106)13:11%3C803::AID-ADMA806%3E3.0.CO

← 1 2 3 →