高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (4): 657.

• 论文 • 上一篇    下一篇

糖脂功能化聚二乙炔Langmuir-Schaefer薄膜与大肠杆菌的分子识别及动力学过程研究

范翊1, 张立功1, 候芳玉2, 马保亮1, 申德振1, 李亚军1   

  1. 1. 中国科学院激发态物理开放实验室, 长春 130021;
    2. 吉林大学病原微生物教研室, 长春 130021
  • 收稿日期:2001-12-21 出版日期:2003-04-24 发布日期:2003-04-24
  • 通讯作者: 李亚军(1943年出生),女,研究员,博士生导师,从事分子电子学研究.E-mail:lbfilm@public.cc.jl.cn E-mail:lbfilm@public.cc.jl.cn
  • 基金资助:

    国家自然科学基金(批准号:6007013,69831010)

Studies on Recognition and Dynamic Analysis of Polydiacetylene Langmuir-Schaefer Films Functionalized with Glycolipid

FAN Yi1, ZHANG Li Gong1, HOU Fang Yu2, MA Bao Liang1, SHEN De Zhen1, LI Ya Jun1   

  1. 1. Lab. Excited State Physics, Chinese Academy of Sciences. Changchun 130021, China;
    2. Department of Pathogenobiology, Jilin University, Changchun 130021, China
  • Received:2001-12-21 Online:2003-04-24 Published:2003-04-24

摘要: 在气液界面上研究了α-D-甘露糖苷-十六烷(MC16)与10,12-二十五碳双炔酸混合单分子膜行为,二者具有较好的互溶性.在疏水的玻璃衬底上用Langmuir-Schaefer(LS)薄膜技术制备单层MC16/PDA薄膜,研究了这种仿生薄膜与大肠杆菌jm109的相互作用.大肠杆菌jm109对MC16修饰的聚二乙炔LS薄膜的吸附,使薄膜颜色由蓝色变为红色,用紫外-可见吸收光谱可进行定量检测.动力学研究显示比色响应值随时间的增加而增加,3min内即有显著变化,15min后趋于饱和,20min后CR值达到28%,进一步探讨了分子识别的动力学过程.

关键词: 糖脂, Langmuir-Schaefer薄膜, 分子识别

Abstract: As a potential materials for optic biosensor, the surface properties of the polydiacetylene films fuctionalized with glycolipid on pure water are interesting and important. Pressure area isotherms of mixed α D mannoside hexadecyl(MC16) and 10,12 pentacosadiynoic acid(PDA) monolayers were studied. The interfacial behavior at the air/water interface show that MC16 /PDA monolayers on the water surface have a good miscibility. The interactions of MC16 with Escherichia coli(E.coli) jm 109 were studied by rapid colorimetric transitions on the MC16 /PDA Langmuir Schaefer (LS) films. This colorimetric transition can be quantified by UV Vis absorption spectra. The kinetic experiments show that the color change induced by the addition of E.coli reaches a plateau after 15 min, although the change becomes apparent within 3 min. Kinetics of the process was discussed. We estimate that one Escherichia coli can only bind two MC16 molecules.

Key words: Glycolipid, Langmuir Schaefer film, Molecular recognition

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