Abstract: | ![]() Carbon 1s (C1s) core-level positions have been calculated for two model compounds which are similar in structure to the PMDA part of the PMDA-ODA monomer of polyimide. It is found that either one or two N-phenyl imide groups fused to a benzene ring will lower the C1s energy levels of the benzene ring. The difference in previous interpretation of the origin of the C1s (ESCA) spectra between the two model compounds examined is shown to be consistent with the difference in calculated magnitude of this shift between the two compounds. |