Dresden 2006 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 23: POSTER Functional Organic Thin Films
CPP 23.8: Poster
Donnerstag, 30. März 2006, 17:00–19:00, P2
Spectroscopic Investigation of Thioaromatic Self-Assembled Monolayers on Gold — •Mihaela Badin1, Andreas Terfort2, Thomas Strunskus1, and Christof Wöll1 — 1Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum — 2Institut für Anorganische und Angewandte Chemie, Universität Hamburg
Self-assembled monolayers (SAMs) are the most important model system for investigating the physical and chemical properties of ultrathin molecular layers. Here, we report on several novel tips of SAMs based on synthesized organothiols. SAMs formed from triptycenethiol (C0T), mercaptomethyltriptycenethiol (C1T), and mercaptopropyltriptycenethiol (C3T) on gold are characterized by infrared reflection absorption spectroscopy, X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy. The aromatic rings and the rigidity of the aromatic system determine the molecular orientation and orientational order of the thioaromatic molecules. In C1T and C3T the insertion of the methylene group creates a conformative flexibility which is important to yield high quality films.[1] Measurement results confirm that these molecules form highly oriented monolayers on the gold surface. C1T and C3T molecules show a tilted orientation with respect to the surface normal. In addition several SAMs formed from different substituted triarylamines are studied under deprotection conditions.
[1] Cyganik, P.; Buck, M.; Azzam, W.; Wöll, C. J. Phys. Chem B 2004, 108, 4989-4996