X-RAY PHOTOELECTRON-SPECTRA OF PHENYLATED ALPHA,OMEGA-DIAMINOALKANES

X-ray photoelectron (XPS) spectra of diamines Ph2N-(CH2)(n)-NPh2 (n = 1-6, 9) were studied. It was found that a basic contribution to the st ructure of XPS spectra is made by interactions between molecules in a crystal rather than intramolecular interactions of the functional grou ps. Broadening of the Cls line is explained by the molecular packing, which becomes closer with increase of the melting point of a compound, and the appearance of a satellite to Cls line is due to additional pi -pi excitation of valence electrons upon removal of an inner-shell ph otoelectron from the molecule. The diamines with n = 2, 3 differ from the studied diamine series by extreme values of their characteristics.