Cellulose-poly(acrylamide-acrylic acid)interpenetrating polymer network membranes for the pervaporation of water-ethanol mixtures.II.effect of ionic group contents and cellulose matrix modification

摘要

In this study, a new polyorganophosphazene with pendant carbazolyl groups was synthesized, and its structure was characterized by IR, ‘H-NMR, and 31P-NMR spectroscopy. To understand its carrier photogeneration and transport prop-erty, we also studied fluorescence spectra and photovoltage spectra. Fluorescence spectra show that the polymer possesses properties dissimilar to those of PVK. There are only two emission peaks at 360 nm in its spectra, which coincides with that of the monomer model compound, 9-ethylcarbazole. This may be because of the influence of the spacer. The results of SPS shows that band—band transition mainly comes from electron #pi#-#pi#~* transition, and the polymer is a p-type semiconductor.