High resolution synchrotron radiation PES study of PbPc deposited on Pt 111/

We studied lead phthalocyanine PbPc.films sublimated under UHV conditions on a clean Pt 111.substrate. We report results from high resolution photoelectron spectra of the Pb 5d, Pb 4f, C 1s, N 1s and Pt 4f core level using synchrotron radiation. Comparison between ultra thin films and thicker films shows that the first molecular adlayer interacts strongly with the substrate and we report evidence of Pb–Pt alloy formation on the surface. For the thick films, the C 1s and N 1s core level spectra show usual characteristics, however in the case of ultra thin films, we note important differences with respect to some previous results. q2000 Elsevier Science B.V. All rights reserved.