FTIR study on conjugation in polyketimines

Conjugation effect in three series of polyketanils obtained from p-dibenzoylbenzene, 1,8-disebacoylbenzene or trans-1,2-dibenzoylethylene and proper diamines were studied using the FTIR spectra. Changes in conjugation caused by modification of the phenyl ring originating from diamine were analyzed and compared with these observed for corresponding polyazomethines. Obtained results were confirmed by the NMR spectra.