题　目：In Situ Studies of Surface Chemical Reactions: From Simple Molecules to Porphyrins

报 告 人：Prof. Dr. Hans-Peter Steinrück (CV_Steinrueck.pdf)

单　　位：Physical Chemistry, University Erlangen-Nürnberg, Germany

时　　间：2012年9月21日，下午03:00

地　　点：煤转化国家重点实验室能源楼三层报告厅（东侧）

报告摘要：

　　Chemical reactions on surfaces can be followed in detail using X-ray photoelectron spectros-copy (XPS or ESCA). From the binding energies of the adsorbate and substrate core levels, detailed information not only on the chemical composition, chemical state (e.g. oxidation state) and adsorption sites, but also on the vibronic final state in the photoemission process itself can be derived. In this presentation, three different examples will be addressed. The first deals with the role of steps in the interaction of saturated hydrocarbon molecules with metal surfaces. From high resolution XP spectra, obtained at BESSY, detailed information on the adsorption, dissociation and the formation of new species can be derived. The vibrational fine structure of the XP spectra is analyzed in detail and can be used to identify various surface intermediates. The second example concerns the oxidation of sulphur on planar and stepped Pt surfaces. Finally, the third example addresses the adsorption of metallo-porphyrins on metal surfaces and their interaction with small molecules. In particular we focus on: (a) synthesis of metalloporphyrin monolayers by direct metalation of porphyrin monolayers, (b) the chemical interaction with the metal surface and (c) attachment of axial ligands on the central metal ion of the metalloporphyrin.