Ionic comonomer effect of poly(N-isopropylacrylamide) copolymer containing D-π-A type pyran-based fluorescent dye

► Temperature and pH responsive copolymer was prepared by radical polymerization. ► With increase of pH values, aqueous copolymer solution showed decrease of a LCST. ► Aqueous copolymer solution showed increase of fluorescence intensity by increasing of pH values. ► Hydrodynamic radius of copolymer also changed by temperature and pH values.