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DS: Dünne Schichten

DS 31: Postersitzung

DS 31.60: Poster

Tuesday, March 27, 2001, 16:30–17:30, Foyer Saal 4

Metal-to-Ligand Charge Transfer in Organometallic Coumpounds — •D. Pop, W. Freyer, R. Weber, B. Winter, and I.V. Hertel — Max-Born-Institut, Max-Born-Strasse 2a, D-12489 Berlin

Phthalocyanines (Pc) containing a central metal atom are most suitable model systems for investigating the various interactions between the metal atom and the surrounding organic ligand. Here we present first results on photoemission experiments headed to systematically study the evolution of the electronic valence structure, including charge transfer processis, of MePc based materials in which the pi-electron system has been varied in a very controlled manner (varied electron delocalization). This has been achieved by benzoannelation. The experiments were performed at the MBI user facility at BESSY II. We will report data on the electron transfer from the central copper metal atom to the ligand system as function of the molecular size. The information are accessible by resonant Cu3p to 4s empty states excitation involving the detection of the corresponding Cu satellites.