Novel porphyrin-labelled poly(N-isopropylacrylamides): syntheses from bromoalkyl-containing prepolymers and physicochemical properties

Novel water-soluble tetraarylporphyrin-labelled polymers have been synthesi zed by the reaction of bromoalkyl-containing poly(N-isopropylacrylamides) w ith 5-(4-pyridyl)-10,15,20-tri(4-methoxyphenyl) porphyrin. Corresponding Zn -porphyrin-containing polymers have also been prepared. Phase transition di agrams show that aqueous polymer solutions exhibit phase separation upon he ating. Absorption spectra of the porphyrin-labelled polymers have been reco rded in water and organic solvents. It is found that the absorption bands i n aqueous polymer solutions are broadened and shifted bathochromically, the peak intensity of the Soret band in the polymer spectra being strongly low ered in water. Fluorescence properties of the polymers are briefly reported . Copyright (C) 2000 John Wiley & Sons, Ltd.