A Comparative E.S.C.A. Study of the Electronic Structure of Solid Acenes: benzene, naphthalene, anthracene, and tetracene

By comparison of the E.S.C.A. valence band spectra recorded in the solid phase for polyacenes (benzene, naphthalene, anthracene, and tetracene) with gas phase results, important energy parameters (energy gap, work function) of these compounds have been obtained. The trends observed in the evolution of the main C1 s shake-up positions and intensities serve to assign the π satellites to transitions of the type n b 1 → b 1 *.