Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 59: Poster Session III (Nanotribology; Polymeric biomolecular films; Organic electronics and photovoltaics, Covalent networks on surfaces; Phase transitions; Particles and clusters; Transparent conductive oxides)
O 59.12: Poster
Mittwoch, 16. März 2011, 17:30–21:00, P3
Preparation and spectroscopic study of self-assembled monolayers of a functionalized perylene dye on SiO2 — •Deb Kumar Bhowmick1, Nabi Aghdassi1, Steffen Linden1, André Devaux2, Luisa De Cola2, and Helmut Zacharias1 — 1Westfälische-Wilhelms Universität, Physikalisches Institut, Wilhelm-Klemm Straße 10, 48149 Münster, Germany — 2Westfälische Wilhelms-Universität, Physikalisches Institut, Mendelstrasse 7, 48149 Münster, Germany
Polyaromatic hydrocarbons (PAHs) are the focus of our attention because of their characteristically high fluorescence quantum yield, their sensitivity properties of their local environment and ability to accesses a wide range of photophysical and electrochemical properties. A perylene derivative, N-benzyl perylene-3,4:9,10-tetracarboxylic-3,4-anhydride-9,10-imide was synthesized. A self-assembled monolayer of this dye was prepared on the aminopropyl triethoxy silane (linker molecule) modified quartz (SiO2) surface by an imide bond between the NH2 group of the linker molecule and the acid anhydride group of the dye. The covalent attachment on the surface was verified by X-ray photo emission spectroscopy and FT-IR spectroscopy. UV absorption and steady-state fluorescence were measured both in the adsorbate and in the solution phase of the dye. Characteristic differences in both phases of the UV absorption, fluorescence spectrum and fluorescence lifetime are observed and will be discussed.