Fig. 4
From: Multi-orbital charge transfer at highly oriented organic/metal interfaces

Electronic structure of Ni-TPP/Cu(100). a Photoemission spectra of clean Cu(100) and Ni-TPP/Cu(100) acquired at 26 eV photon energy. b PDOS onto molecular orbitals for the Ni-TPP/Cu(100) system. The energy position of the corresponding gas-phase molecular orbitals, aligned with respect to the vacuum level, is indicated with colored bars on the top axis. c DOS of the entire molecule (black curve), PDOS onto the phenyl group (light blue curve) and on the macrocycle (green curve)