Berlin 2008 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 18: Poster: Towards Molecular Spintronics, Organic Thin Films, Optical Layers, Vibrational Spectroscopy, Tayloring organic interfaces

DS 18.6: Poster

Dienstag, 26. Februar 2008, 14:30–19:30, Poster A

Electronic excitation spectra of transition metal phthalocyanines — •Roberto Kraus, Mandy Grobosch, and Martin Knupfer — IFW Dresden, D-01069 Dresden, Germany

The electronic structure of transition metal phthalocyanine (TMPc) complexes offer valuable insight into the interaction of the metal ion with its surrounding, the organic ligand. Therefore, they represent simple model compounds for the investigation of the electronic properties of many other transition containing molecules, among them many molecular magnetic complexes. In fact, MnPc has been referred to as a typical example of a molecular magnet. Surprisingly, despite a large number of experimental and theoretical studies essential details of the electronic structure and excitations of TMPcs remained unclear, but are of tremendous importance to understand the spin and charge ground state of the enclosed transition metal ion. We present a characterization of the full electronic excitation spectra of MnPc and FePc, which have been determined using optical as well as electron energy-loss spectroscopy. We discovered low lying electronic excitations that have been observed in the past and discuss the results in view of previous theoretical work.