高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (12): 2319.

• 研究论文 • 上一篇    下一篇

溶液中聚(N-异丙基-2-甲基丙烯酰胺)热相变可逆性的杂合二维相关红外光谱研究

王立旭1,王德秋2,吴玉清1   

  1. 1.吉林大学超分子结构与材料教育部重点实验室,长春130012;
    2.长春市环境保护研究所,长春130022
  • 收稿日期:2004-11-29 出版日期:1905-03-14 发布日期:1905-03-14
  • 通讯作者: 吴玉清(1966年出生),女,博士,教授,从事生物体系分子识别及相关谱学研究.E-mail:yqwu@jlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:20003004,20373017和20473028)、国家重点基础研究发展规划项目(批准号:G2000078102)和长江学者和创新团队发展计划(批准号:IRT0422)资助.

Hybrid Two-dimensional Correlation Infrared Spectrum of  Reversibility of Thermal-induced Phase Transition of Poly(N-isopropylmethacrylamide) in Aqueous Solutions

WANG Li-Xu1, WANG De-Qiu2,  WU Yu-Qing1*   

  1. 1. Key Laboratory for Supramolecular Structure and Materials of Ministry of Education, Jilin University, Changchun 130012, China;
    2. Changchun Institute of Enviromental Protection, Changchun 130022, China
  • Received:2004-11-29 Online:1905-03-14 Published:1905-03-14
  • Contact: WU Yu-Qing;E-mail:yqwu@jlu.edu.cn

摘要:

基于聚(N-异丙基-2-甲基丙烯酰胺)(PNiPMA)在升温和降温两个过程中测得的变温红外光谱构筑样本-样本杂合二维相关(Hybrid 2D Correlation)光谱,揭示其在热诱导相变过程中初始组分的恢复程度、相转变温度以及转变速率等物理参数的可逆性.

关键词: PNiPMA;热相变可逆性;FTIR;杂合二维相关光谱, PNiPMA, 热相变可逆性, FTIR, 杂合二维相关光谱

Abstract:

Temperature-induced reversibility of coil-globule transition was  studied for poly(N-isopropylmethacrylamide)(PNiPMA) in aqueous solutions by means of Fourier transform infrared(FTIR) spectroscopy and hybrid two-dimensional(2D) correlation spectroscopy. The degree of the symmetry along the diagonal line for PNiPMA in sample-sample(SS) hybrid  two-dimensional IR correlation spectrum which  was constructed from IR spectra measured in heating and cooling processes reflects  the  recovery rate of original species, transition temperature, and the rate of the concentration changes during the phase transition. The present study demonstrates a novel application of hybrid  two-dimensional correlation spectroscopy in exploring the reversibility of phase transitions in polymer, such kind of study has a  great potential application to  revealing the phase transition dynamics and molecular interactions of polymers and proteins.

Key words: PNiPMA; Reversibility of thermal-induced phase transition; FTIR; Hybrid  two-dimensional correlation spectroscopy, PNiPMA, Reversibility of thermal-induced phase transition, FTIR, Hybrid two-dimensional correlation spectroscopy

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