Electron spectroscopy on the charge transfer complex [(7-amino-2,4 dimethyl-1,8 naphthyridine) (TCNQ)] (TCNQ = 7,7',8,8'-tetracyanoquinodimethane)

Reflection electron energy loss spectroscopy (REELS) and optical reflectivity measurements have been used to characterize in the valence energy region the dielectric behavior of 7-amino-2,4 dimethyl-1,8 naphthyridine and of the charge transfer complex formed by this compound and the 7,7′,8,8′-tetracyanoquinodimethane (TCNQ). The effects of the charge transfer interaction on the core energy levels have been investigated by comparing the line shape of the carbon and nitrogen 1 s core photoelectron peaks of the electron-donor and electron-acceptor molecules and of the charge transfer complex formed by them.