COOH-terminated SAMs on gold fabricated from an azobenzene derivative with a 1,2-dithiolane headgroup期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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COOH-terminated SAMs on gold fabricated from an azobenzene derivative with a 1,2-dithiolane headgroup

Authors:	Ulrich Siemeling Stefan Rittinghaus Jeremy Brison

Institution:	^a Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, D-34132 Kassel, Germany ^b National ESCA and Surface Analysis Center for Biomedical Problems (NESAC/BIO), Department of Bioengineering, University of Washington, 98195 Seattle, WA, USA ^c National ESCA and Surface Analysis Center for Biomedical Problems (NESAC/BIO), Department of Chemical Engineering, University of Washington, 98195 Seattle, WA, USA

Abstract:	Well-defined and homogeneous, contamination-free self-assembled monolayers (SAMs) were fabricated by the chemisorption of lip-NH-p-C₆H₄-NN-p-C₆H₄-COOH (lip = α-lipoyl) onto gold. This adsorbate species is composed of a 1,2-dithiolane-based headgroup, an azobenzene-based (and hence photochromic) spacer unit and a carboxylic acid functional group. The SAM constituents are covalently attached to the substrate by the bidentate thiolate anchor groups and exhibit a strongly tilted binding configuration.

Keywords:	Azobenzene Gold NEXAFS Self-assembly XPS
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