SYNCHROTRON-RADIATION PHOTOCHEMISTRY OF COPPER PHTHALOCYANINE LAYERS

The influence of synchrotron radiation (SR) in vacuum-deposited layers of copper phthalocyanine (CuPc) and the influence of the following va cuum thermal development in the positive and negative exposed CuPc lay ers were investigated by EPR, Raman spectroscopy, UV-visible spectrosc opy, X-ray diffraction, mass spectrometry using Knudsen cell. It was e stablished that the layers of alpha-CuPc possessed EPR anisotropy. The anisotropy decreased with an increase of SR exposure and changed for negative exposed layers and for layers heated at development temperatu re. For positive exposed and unexposed layers of CuPc, the alpha --> b eta-phase transition occurred at development temperature, but this pro cess was not observed at development of negative exposed layers. Mass spectra of evaporated CuPc molecules from unexposed and positive expos ed layers were similar. Only for negative exposed layers the additiona l protonated molecules of CuPc were recorded in mass spectra. Unexpose d, positive exposed and negative exposed CuPc layers had different tem perature dependencies of pressure of evaporated molecules. All measure d spectra and dependencies were analysed and SR photochemistry of CuPc layers was discussed.