title: Ionic comonomer effect of poly(N-isopropylacrylamide) copolymer containing D-π-A type pyran-based fluorescent dye.
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.
authors.affiliation: BK21 FTIT Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University, Daejeon 305-764, Republic of Korea.
authors.forename: Eun-Mi
authors.initials: EM
authors.lastname: Lee
authors.forename: Seon-Young
authors.initials: SY
authors.lastname: Gwon
authors.forename: In-Jeong
authors.initials: IJ
authors.lastname: Hwang
authors.forename: Young-A
authors.initials: YA
authors.lastname: Son
authors.forename: Sung-Hoon
authors.initials: SH
authors.lastname: Kim
mesh_terms: D000178:Acrylamides / Q000737:chemistry*; D000180:Acrylic Resins; D005456:Fluorescent Dyes / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D011714:Pyrans / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013696:Temperature
chemical_list: D000178:Acrylamides; D000180:Acrylic Resins; D005456:Fluorescent Dyes; D011108:Polymers; D011714:Pyrans; C052970:poly-N-isopropylacrylamide; C045985:methacrylamide