Gas phase and bulk ultraviolet photoemission spectroscopy of 3,4,9,10-perylene-tetracarboxylic dianhydride, 1,4,5,8-naphthalene-tetracarboxylic dianhydride, and 1,8-naphthalene-dicarboxylic anhydride

摘要

The π-conjugated organic molecules 3,4,9,10-perylene-tetracarboxylic dianhydride,1,4,5,8-naphthalene-tetracarboxylic dianhydride, and 1,8-naphthalene-dicarboxylic anhydride wereinvestigated via gas phase and bulk ultraviolet photoemission spectroscopy and compared to densityfunctional theory calculations. Values for final state effects such as intermolecular polarization weredetermined and the differing features in the spectra interpreted as a consequence of interactions inthe thin films. Additionally, the highest occupied molecular orbitals of the molecules clearly showdistinctive peaks originating from vibrational excitations, leading to results for Franck-Condon factors.