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  • Title: Ionic comonomer effect of poly(N-isopropylacrylamide) copolymer containing D-π-A type pyran-based fluorescent dye.
    Author: Lee EM, Gwon SY, Hwang IJ, Son YA, Kim SH.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2012 Jun 15; 92():33-6. PubMed ID: 22402576.
    Abstract:
    Temperature and pH responsive poly(N-isopropylacrylamide) (poly(NIPAM)) copolymer containing D-π-A type pyran-based fluorescent dye (fluorophore) and basic comonomer, N-[3-(dimethylamino)propyl]-methacrylamide (DMAPAM) was prepared by free radical polymerization. With increase of pH values, aqueous poly(NIPAM-co-DMAPAM-co-fluorophore) solution showed decrease of a lower critical solution temperature (LCST) and increase of fluorescence intensity, due to a change in the ionization state. And also hydrodynamic radius of poly(NIPAM-co-DMAPAM-co-fluorophore) changed correspondingly to changes of temperature and pH values.
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