Dresden 2009 – scientific programme
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DF: Fachverband Dielektrische Festkörper
DF 6: Poster I
DF 6.14: Poster
Tuesday, March 24, 2009, 09:30–12:30, P5
Preparation and characterization of [Fe(CN)5NO]2− electrostatically attached to TiO2 surfaces — Volker Dieckmann1, •Sebastian Eicke1, Mirco Imlau1, Dereje Hailu Taffa2, Lorenz Walder2, and Theo Woike3 — 1Department of Physics, University of Osnabrück, Barbarastr. 7, D-49069 Osnabrück, Germany — 2Institute of Chemistry, Center of Interface Science (CIS), Universtity of Osnabrück, Barbarastr. 7, D-49069 Osnabrück, Germany — 3I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
Sodium nitroprusside (Na2[Fe(CN)5NO]) undergoes a photoinduced NO ligand linkage isomerism in bulk crystal and in solution. In the latter case the complex can release NO and CN− after photoexcitation with UV or blue-green light. So far nothing is known on the behavior of nitroprusside in thin films. We have introduced a new technique for holding highly charged complexes in a film, and applied it to [Fe(CN)5NO]2− ions. They are electrostatically attached to a 14-phosphonotetradecane-1-pyridinium, which acts as spacer to the inner walls of a mesoporous TiO2-film. A characterization of the system is performed by infrared absorption spectroscopy as well as by electrochemical studies. We are discussing spectral changes during and after light illumination on the background of the photoinduced linkage isomerism, as well as NO and CN− release.