Preparation and Spectroscopic Properties of Polyglycidyl Methacrylate Bonding Zinc Phthalocyanine on Side Chains

Tetra amino zinc phthalocyanine (ZnTAPc) was bonded on the side chains of polyglycidyl methacrylate (PGMA) through the ring opening reaction between the amino groups of ZnTAPc and the epoxy groups of PNMA, (denoted as ZnAPc-PGMA). Subsequently, Schiff base reaction between ZnAPc-PGMA and dimethylamino-benzaldehyde (DMAB) was carried out to prepare PGMA bonded with the aromatic Schiff base-contained zinc phthalocyanine (denoted as ZnABPc-PGMA). The effects of the kinds of catalysts and temperature on the bonding process of ZnTAPc on PGMA were investigated by the determination of bonding degree of ZnAPc on PGMA. Their UV-Visible absorption spectra and fluorescence emission spectra were determined, and their photophysical behavior was examined. Results show that ZnAPc-PGMA and ZnABPc-PGMA possess the characteristic electronic absorption and fluorescence emission spectra of zinc phthalocyanine. In addition, they still present some other characters. As ZnTAPc is bonded to PGMA, its aggregability is weakened effectively. And the intensity of the absorption spectra of ZnAPc-PGMA increases with the increasing bonding amount of ZnAPc on the side chains of polymer PGMA. However, ZnAPc-PGMA exhibits a polymer effect in its photophysical behavior. As the concentration of ZnAPc units in ZnAPc-PGMA solution increase, the energy transfer between the adjacent side ZnAPc units will be produced, resulting in the slight weakening of the fluorescence emission.