Langmuir, 17 (12), 3689 - 3695, 2001.
Web Release Date: May 11, 2001
Structural Characterization of Organothiolate Adlayers on Gold: The Case of Rigid, Aromatic Backbones
Claus Fuxen,1 Waleed Azzam,1 Ralf Arnold,1 Gregor Witte,1 Andreas Terfort,2 and Christof Wöll*1
1 Ruhr-Universität Bochum, Physikalische Chemie I, Universitätsstr. 150,
D-44801 Bochum, Germany, and
2 Universität Hamburg, Institut für Anorganische und Angewandte Chemie, Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany
Received December 26, 2000
In Final Form: March 5, 2001
Here, we present the results of a detailed characterization of rigid-rod thiolate adlayers on Au(111) made by self-assembly of organothiols containing a terphenyl backbone, namely, p-terphenylthiol (TPT, C6H5-(C6H4)2-SH) and p-terphenylmethanethiol (TPMT, C6H5-(C6H4)2-CH2-SH) on Au(111). The results of low energy electron diffraction measurements reveal the presence of long-range order for adlayers prepared from both molecules. From the body of data obtained by X-ray photoelectron spectroscopy, infrared reflection-absorption spectroscopy, near-edge X-ray absorption fine structure measurements, and scanning tunneling microscopy, a structure model for adlayers of TPT and TPMT on Au(111) is proposed.
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