An IR spectroscopic study of H-bonding and polymer-water and polymer-H-donor molecule interactions in polynaphthoylenimide derivatives

The processes of sorption-desorption of water, phenol and chlorophenol molecules and H/D isotope exchange in N-phenylsubstituted polynaphthoylenimidebenzimidazole (PNIBPH) and polynaphthoylenimides bearing various substituents in the diamine moiety (PNI) have been investigated by FTIR spectroscopy. Different types of water have been identified in PNIBPH and PNI. Phenol and chlorophenol, added to PNIBPH and PNI, compete with water molecules for H-bonding with CO and NR groups, and affect the H-bond network in polymers. A temperature anomaly has been observed in the IR spectra of PNIBPH and PNI, analogous to that reported earlier for PNIB (T.B. Chenskaya et al., Khim. Fiz., 12, N7 (1993) 934), suggestive of a common nature of this effect. The water III content (earlier referred to as the ''cluster water'') is shown to depend on the polymer structure.