高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (5): 739.

• 研究论文 • 上一篇    下一篇

4-氨基吡啶分子模板聚合物选择性识别及结合性质的研究

郭洪声1, 何锡文1, 景莹2, 梁宏2   

  1. 1. 南开大学化学系, 天津 300071;
    2. 广西师范大学生命与化学学院, 桂林 541004
  • 收稿日期:2000-04-27 出版日期:2001-05-24 发布日期:2001-05-24
  • 通讯作者: 何锡文(1939年出生),男,教授,博士生导师,从事分子模板及分子识别研究.
  • 基金资助:

    国家自然科学基金(批准号:29775011);天津市自然科学基金(批准号:003602211);广西壮族自治区教育厅科研项目资助课题

Studies on the Binding Nature in Molecularly Imprinted Polymer Selective for 4-Aminopyridine

GUO Hong-Sheng1, HE Xi-Wen1, JING Ying2, LIANG Hong2   

  1. 1. Department of Chemistry, Nankai University, Tianjin 300071, China;
    2. College of Biology and Chemistry, Guangxi Normal University, Guilin 541004, China
  • Received:2000-04-27 Online:2001-05-24 Published:2001-05-24

摘要: 以4-氨基吡啶为模板分子制备了对4-氨基吡啶具有特异选择性的模板聚合物.制得的棒状聚合物经研磨、过筛后,采用平衡结合方法评价了该模板聚合物的结合特性.Scatchard分析表明,在所研究的浓度范围内,聚合物中形成了两类不同的结合位点,这两类结合位点的离解常数采用多点结合模型计算得到的值分别为6.0μmol/L和1.2mmol/L.底物选择性表明,与其它结构相似的分子相比,该聚合物对模板分子4-氨基吡啶显示了很强的结合能力.1HNMR研究及4-氨基吡啶共振结构分析表明,模板分子与聚合物中的结合位点之间的作用为离子作用.

关键词: 分子印迹, 4-氨基吡啶, 分子识别, 底物选择性

Abstract: Amolecularly imprinted polymer was prepared using 4-aminopyridine as template. The bulk polymer obtained was ground up, sieved and investigated in equilibrium binding experiments to evaluate the binding characteristics of the 4-aminopyridine imprinted polymer. Scatchard analysis showed that two classes of binding sites were produced in the polymer matrix and their dissociation constants were calculated to be 6.0 μmol/Land 1.2 mmol/Lrespectively, by utilizing the model of multiple independent classes of binding sites. The substrate selectivity of the polymer was investigated. The results showed that the imprinted polymer exhibited much higher affinity for 4-aminopyridine among the tested compounds. 1HNMR studies and the analysis of the resonance structure of 4-aminopyridine indicated that the selective binding interaction between the template and binding sites in the polymer arose from their ionic interaction.

Key words: Molecular imprinting, 4 Aminopyridine, Molecular recognition, Substrates selectivity

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