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Single chain dynamics of temperature-responsive polymer using single molecule spectroscopy

Research Project

Project/Area Number 24550254
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Polymer/Textile materials
Research InstitutionKyoto Institute of Technology

Principal Investigator

SHINJIRO Machida  京都工芸繊維大学, 工芸科学研究科, 准教授 (20262032)

Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords温度応答性高分子 / 蛍光性色素 / 原子移動ラジカル重合 / スタッキング / 会合体 / ヒステリシス / 動的光散乱 / 蛍光スペクトル / 単一高分子鎖 / 単一分子分光 / 蛍光 / 相転移ダイナミクス / コイル-グロビュール転移 / ダイナミクス
Outline of Final Research Achievements

We synthesized a temperature-responsive polymer (poly(N-isopropylacrylamide); PNIPAM) bearing a fluorescent perylenetetracarboxylic diimide (PTCDI) group. Dynamic and static light scattering measurement indicated that the PTCDI-PNIPAM forms aggregates in cold water and that the aggregate consists of ~2,000 polymer chains. The aggregation at low temperatures was concluded to be due to the π-π stacking of the PTCDI groups. The π-π stacking of the PTCDI was concluded to suppress the dissociation of PNIPAM chains in the cooling process and enhanced the hysteresis in transmittance, diameter, and fluorescence spectrum.
Bright spots attributable to single PTCDI-PNIPAM chains were observed in confocal fluorescence microscope images of the spin-coated samples. However, the bright spots disappeared by the addition of hot water over the samples, possibly due to the removal from the substrate.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (2 results)

All 2015 2014

All Presentation (2 results)

  • [Presentation] Photophysical and Temperature-responsive Properties of Poly(N-isopropylacrylamide) Bearing a Perylenediimide Group2015

    • Author(s)
      Shinjiro Machida
    • Organizer
      The Third KIT INTERNATIONAL SYMPOSIUM ON ADVANCED POLYMER MATERIALS and FIBER SCIENCE
    • Place of Presentation
      京都工芸繊維大学
    • Year and Date
      2015-02-23 – 2015-02-24
    • Related Report
      2014 Annual Research Report
  • [Presentation] ペリレンジイミドを有するポリ(N-イソプロピルアクリルアミド)の光物理特性および温度応答挙動2014

    • Author(s)
      内橋、町田、池田
    • Organizer
      第63高分子学会年次大会
    • Place of Presentation
      名古屋国際会議場
    • Related Report
      2013 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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