PORPHYRIN-LABELED POLY(N-ISOPROPYLACRYLAM IDE) PREPARATION AND SPECTRAL PROPERTIES

A series of copolymers with varying content of porphyrin units was pre pared by copolymerization of 5-(4-acrylamidophenyl)-10,15,20-triphenyl porphyrin with N-isopropylacrylamide. Zn-containing analog of one of t he copolymers was also synthesized. It was established that the intens ities of some absorption bands of a porphyrin chromophore markedly cha nge upon polymerization. It was shown that the absorption properties o f the aqueous solutions of the resulting polymers gradually change nea r LCST of N-isopropylacrylamide, whereas the fluorescence polarization sharply increases upon phase transition.