Abstract
This aim of this study was the conversion of indanthrone from its precursor, BOC-indanthrone, by acidolytic treatment in a photo-polymeric film. Because the high temperature and long thermal treatment time required for the deprotection of the BOC protective group may damage the application medium, acidolysis was employed to reduce the thermal treatment temperature and time in this study. Ultraviolet-visible (UV-vis) and Fourier-transform infrared (FTIR) spectroscopy showed that, in the presence of a photoacid generator (PAG), the conversion of BOC-indanthrone to indanthrone was achieved in the photopolymeric film at a low temperature and short thermal treatment time. Further, field-emission scanning electron microscopy (FESEM) and optical and polarized optical microscope (OM and POM) observations indicated that thermal treatment after acidolysis resulted in the formation of regenerated pigments, and they exhibited good dispersion in the photopolymeric film.
