As a model molecule for a specific part of a polyimide, pthalimide has been studied adsorbed upon copper substrates at low temperatures using angle-dependent x-ray photoelectron spectroscopy. A stable adsorbate is found to exist in the approximate range −30 °C≤T≤−5 °C. The pthalimide molecule lies approximately flat upon the polycrystalline copper surface. Charge transfer from the copper to the adsorbate is observed. The present results are in contrast with those obtained when copper is vapor deposited upon a polyimide, as reported in the literature.

Some details of the chemical and electronic structure of tri-p-dimethylaminophenyl carbonium chloride, or Crystal violet (CV), have been studied by Ultra Violet Photoelectron Spectroscopy (UPS) and X-Ray Photoelectron Spectroscopy (XPS, or ESCA). Thin films consisting of either the salt, CV+Cl-, or metastable neutral molecules, CV0, have been studied. Valence band spectra of ultra thin solid films of crystal violet are compared with the UPS spectra of N,N-dimethylaninile (NNDMA) and p-methyl-N,-N-dimethylaniline (p-M-NNDMA) in the gas phase. Preliminary MNDO and VEH calculations are used to interpret the spectra.