Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, Leibnizstr. 19, 24118 Kiel, Germany.
Langmuir. 2011 May 17;27(10):5899-908. doi: 10.1021/la104654p. Epub 2011 Apr 20.
Adlayers of different azobenzene-functionalized derivatives of the triazatriangulenium (TATA) platform on Au(111) surfaces were studied by scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), gap-mode surface-enhanced Raman spectroscopy (gap-mode SERS), and cyclic voltammetry (CV). The chemical composition of the adlayers is in good agreement with the molecular structure, i.e., different chemical groups attached to the azobenzene functionality were identified. Furthermore, the presence of the azobenzene moieties in the adlayers was verified by the vibration spectra and electrochemical data. These results indicate that the molecules remain intact upon adsorption with the freestanding functional groups oriented perpendicularly to the TATA platform and thus also to the substrate surface.
在 Au(111) 表面上，通过扫描隧道显微镜（STM）、X 射线光电子能谱（XPS）、间隙模式表面增强拉曼光谱（gap-mode SERS）和循环伏安法（CV）研究了不同三嗪三嗪并[3,4-a:3′,4′-c]吩嗪（TATA）平台的偶氮苯功能化衍生物的吸附层。吸附层的化学成分与分子结构非常吻合，即鉴定出了连接在偶氮苯官能团上的不同化学基团。此外，吸附层中存在偶氮苯部分通过振动光谱和电化学数据得到了验证。这些结果表明，分子在吸附时保持完整，自由的功能基团垂直于 TATA 平台，因此也垂直于基底表面。
