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癸基萘磺酸钠胶束中分子动态的质子核磁共振研究

杨晓焱1, 谭晓理2, 袁汉珍1, 毛诗珍1, 赵濉2, 张路2,  安静仪2, 俞稼镛2,  杜有如1*   

  1. 1.中国科学院武汉物理与数学研究所,波谱与原子分子物理国家重点实验室,湖北武汉 430071;  
    2.中国科学院物理化学技术研究所,北京 100101
  • 收稿日期:2003-03-29 修回日期:2003-06-25 出版日期:2003-12-05 发布日期:2003-12-05
  • 作者简介:*通讯联系人:杜有如, E-mail:lfshen@wipm.ac.cn
  • 基金资助:

    The Fundamental National Key Basic Research Development Program “Fundamental Study on Extensively Enhanced Oil Recovery” (Project Grant G1999022504) and NSFC(20373087).

DYNAMICS OF SODIUM 4-DECYL NAPHTHALENE SULFONATE MOLECULES IN MICELLES STUDIED BY 1H NMR RELAXATION

YANG Xiao-yan1, TAN Xiao-li2, YUAN Han-zhen1, MAO Shi-zhen1, ZHAO Sui2, ZHANG Lu2, AN Jing-yi2, YU Jia-yong2, DU You-ru1*   

  1. 1.State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The  Chinese Academy of Sciences, Wuhan 430071, China;
    2. Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100101, China
  • Received:2003-03-29 Revised:2003-06-25 Online:2003-12-05 Published:2003-12-05
  • About author:Yang Xiao-yan(1975-),Famale, Henan Province, postgraduate, who study NMR now.  *Correspondence author:Du You-ru, E-mail: lfshen@wipm.ac.cn.
  • Supported by:

    The Fundamental National Key Basic Research Development Program “Fundamental Study on Extensively Enhanced Oil Recovery” (Project Grant G1999022504) and NSFC(20373087).

摘要:

在298、303和313 K下对浓度为0.82 和2.59 mmol/L的癸基萘磺酸钠的重水溶液中质子的自旋-自旋弛豫(T2)时间进行了测量. 浓度为0.82 mmol/L 的溶液(临界胶束浓度CMC以下)中的所有质子的T2值均随温度上升而增长,说明整个分子运动变的更自由. 然而,浓度在CMC以上(2.59 mmol/L)时,分子中一部分参与形成栅栏层的质子的T2值却表现出相反的效应,它们的运动随温度上升而变慢,说明在高温下为防止水分子进入疏水胶束壳内,这些栅栏层的质子堆积的更紧密. 同时分子中其他质子的T2值随温度上升而增长,表现出正常的分子运动的温度效应.

关键词: 核磁共振, 分子动态, 质子自旋-自旋弛豫, 癸基萘磺酸钠, 胶束栅栏层

Abstract:

1H spin-spin (T2) relaxation times of sodium 4-decyl naphthalene sulfonate (SDNS) protons at different concentrations of 0.82 and 2.59 mmol/L were meas
ured at 298, 303 and 313 K. These T2 values give the information about the dynamic characteristic of SDNS molecules in their monomeric and micellar states. The decrease in the T2 values of a part of SDNS micellar protons, which participate in the formation of the palisade layer, with the increase in temperature suggests that the palisade layer becomes more tightly compact with the increase in temperature in order to prevent water penetration into the hydrophobic micellar core. While the reverse effect of the other protons in the T2 values with the temperature up to 313 K shows that their motion of those protons is enhanced.

Key words: NMR, dynamics,  1H spin-spin relaxation, sodium 4-decyl naphthalene sulfonate, the palisade layer of micelle

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