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Zusammenfassung:
The electronic structure of valence orbitals of adsorbed big organic molecules has been studied by means of UV photoemission and calculations using various semiempirical methods. The aromatic molecules perylene and its derivative PTCDA (perylene-tetracarboxylic dianhydride) have been adsorbed as oriented mono- and multilayers on two different, well-defined surfaces, Si(111) and Ag(111).
