Berlin 2012 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
O: Fachverband Oberflächenphysik
O 35: Poster Session II (Polymeric biomolecular films; Nanostructures; Electronic structure; Spin-orbit interaction; Phase transitions; Surface chemical reactions; Heterogeneous catalysis; Particles and clusters; Surface magnetism; Electron and spin dynamics; Surface dynamics; Methods; Electronic structure theory; Functional molecules)
O 35.144: Poster
Tuesday, March 27, 2012, 18:15–21:45, Poster B
Probing gas ligation of surface anchored porphyrins through an experiment-theory IETS study — •Knud Seufert1, Willi Auwärter1, Shiri Burema2, Marie-Laure Bocquet2, Johannes V. Barth1, David Écija1, and Saranyan Vijayaraghavan1 — 1Physik Department E20, TU München, Germany — 2CNRS, Université de Lyon, France
The response of metalloporphyrins towards small gas molecules is of fundamental interest as it plays a key role in both biological systems as the transport of respiratory gases and artificial nanostructures as sensors. STM and STS investigations combined with DFT-calculations turned out to be a good method to get insight into such systems. Here we present the ligation of NO to Co-TPP, immobilized onto a metallic substrate. The molecular interaction with the substrate is weakend by the binding of the bent NO radical to the metal-center. This results in a changed appearance and electronic structure. IETS spectra of this system were performed and the measured signal was assigned to an unique vibration mode on the NO-complex, namely the Co-N-O Rocking mode lying in a plane perpendicular to the metallic surface. Furthermore the experimental extension to other porphyrins and diatomic gases is shown.