Dresden 2017 – scientific programme

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O: Fachverband Oberflächenphysik

O 34: Solid-Liquid Interfaces: Reactions and Electrochemistry - Experiment II

O 34.4: Talk

Tuesday, March 21, 2017, 11:30–11:45, HSZ 101

Ion Exchange: Reactions of Porphyrins on Oxides and in Liquids — •Ole Lytken¹, Matthias Franke¹, Quratulain Tariq¹, Daniel Wechsler¹, Julia Köbl¹, Norbert Jux¹, Hubertus Marbach¹, Hans-Peter Steinrück¹, Florencia Marchini², Federico Williams², Tao Wang³, Cici Wang³, Qian Xu³, and Junfa Zhu³ — ¹Universität Erlangen-Nürnberg — ²University of Buenos Aires — ³University of Science and Technology of China

Porphyrins and their analogues are large organic molecules that play significant roles in vivo, e.g. in light harvesting and photosynthesis (chlorophyll) and oxygen transport and storage in the blood cells of mammals (hemoglobin and myoglobin). In recent years the adsorption of porphyrins on metal surfaces has been studied extensively, but, despite the technological importance of oxides, much less work exists on the adsorption of porphyrins on oxide surfaces. Using X-ray photoelectron spectroscopy to study the adsorption and reactions of 5,10,15,20-tetraphenylporphyrin on MgO(100) and TiO2(110) surfaces, the behavior on oxide surfaces is shown to have a lot in common with reactions known from the liquid phase, such as ion exchange and protonation.