Journal
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Volume 50, Issue 11, Pages 2219-2226Publisher
WILEY
DOI: 10.1002/pola.25995
Keywords
living radical polymerization (LRP); N-isopropylmethacrylamide; pH; reversible addition-fragmentation chain transfer polymerization; sensors; stimuli-sensitive polymers; temperature
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Funding
- NSFC/China [50673025]
- National Basic Research 973 Program [2006CB806200]
- Scientific Committee of Shanghai
- ECUST [YJ0157116]
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Simple-structured copolymer, poly(NIPMAM-co-CPMA), consisting of N-isopropylmethacrylamide (NIPMAM) and (Z)-4-(1-cyano-2-(4-(dimethylamino) phenyl)vinyl)phenyl-methylacrylate (CPMA) units as thermo- and pH-responsive fluorescent signaling parts, respectively, has been synthesized by reversible addition-fragmentation chain transfer polymerization. The copolymer PCN250 (m/n = 250) shows absorbance enhancement or decrease at different pH value. However, the fluorescence intensity of this copolymer shows enhancement with a rise in temperature regardless of pH value in the range of pH 4-10. In addition, fluorescence suppression of copolymer (PCN250) was observed with high proton concentration. Moreover, the lower critical solution temperature of the copolymers, poly-(NIPMAM-co-CPMA), with different component was also investigated. (C) 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 50: 2219-2226, 2012
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