Presenter：Prof. Dr.Hans-Peter Steinrück (University of Erlangen-Nuremberg, Germany)

Topic：Molecular-level insights into self-metalation and ring-fusion of porphyrins on surfaces

Time：October 28, 15:30 (Wednesday)

Location：909-B

Abstract：

Metalloporphyrins are versatile functional building blocks in many biological and biochemical processes. In addition, these molecules are also utilized in technical applications, retaining their highly functional nature within an inorganic framework. Examples include gas sensors, solar cells and catalysts. In this presentation, the surface chemistry of porphyrins on metal substrates will be addressed by scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and temperature-programmed desorption (TPD). Specific topics are (1) how does functionalization of the porphyrins with dibenzo-groups and CN-groups influence the self-metalation of porphyrins on Cu(111); and (2) intramolecular ring-fusion reactions at higher temperatures; in order to study the latter, we developed a novel displacement-assisted TPD approach, in which the adsorbed species is displaced from the monolayer into the multilayer prior to desorption by a displacement agent. This approach allows for the detection and unambiguous identification of species that would otherwise decompose on the surface before desorption.

Biography：

Hans-Peter Steinrück did his PhD in physics at TU Graz 1985, was postdoc at Stanford University 1985/86, received his Habilitation at TU München 1992, and became Professor of Physics at Würzburg University in 1993. From 1998 to 2025, he held a chair of Physical Chemistry at Friedrich-Alexander-University Erlangen-Nuremberg (FAU), and since 2025 is Senior Professor at (FAU). He was/is Guest Professor at USTC/Hefei and Soochow University/Suzhou in China, holds a honorary doctorate degree from Szeged University in Hungary, is member of the European Academy of Sciences, the German Academy of Sciences Leopoldina, the Austrian Academy of Sciences and Academia Europaea, and is Fellow of APS and AAAS. In 2016 he received an ERC Advanced Grant, in 2017 the AVS Medard W. Welch Award in the USA, in 2019 the Morino Lectureship in Japan, and in 2021 the Henriette-Herz-Scout distinction of the Alexander von Humboldt Foundation in Germany. His research focusses in surface and interface science, from ionic liquids, porphyrins, liquid metals and liquid organic hydrogen carriers to chemically modified graphene. He published more than 450 peer-reviewed papers.

Contact：Prof. Liang Zhang