波谱学杂志 ›› 2000, Vol. 17 ›› Issue (1): 63-67.

• 研究论文 • 上一篇    下一篇

α-环糊精和甲酚异构体包结的动态结构及其平衡常数的NMR研究

殷开梁1, 杨扬1, 徐端钧2   

  1. 1 江苏石油化工学院化学工程系, 常州 213016;
    2 浙江大学化学系, 杭州 310027
  • 收稿日期:1999-10-14 修回日期:1999-11-01 出版日期:2000-02-05 发布日期:2018-01-10
  • 作者简介:殷开梁,男,1965年出生,硕士,讲师
  • 基金资助:
    江苏石油化工学院科技基金资助项目

NMR STUDIES ON THE DYNAMIC STRUCTURES AND EQUILIBRIUM CONSTANTS OF α-CYCLODEXTRIN WITH CRESOL ISOMERS

YIN Kailiang1, YANG Yang1, XU Duanjun2   

  1. 1 Depaertment of Chemical Engineering, Jiangsu Institute of Petrochemical Technology, Changzhou 213016;
    2 Department of Chemistry, Zhejiang University, Hangzhou 310027
  • Received:1999-10-14 Revised:1999-11-01 Online:2000-02-05 Published:2018-01-10

摘要: 报道了重水溶液中α-环糊精与对甲酚、间甲酚发生包结作用的1H NMR研究结果.实验发现,尽管未包结的α-环糊精和包结后的α-环糊精疏水腔中的同类质子有着不同的化学位移,但1H NMR只检测到一个峰,且峰的位置随包结程度的变化而异.由1 HNMR的数据计算得到了α-环糊精在不同包结程度下的平均几何结构和平衡常数,描述了客体在主体腔中进入深度动态变化的情形,并和β-环糊精的结果进行了比较.

关键词: α-环糊精, 甲酚, 1H NMR, 包结物, 包结平衡, 动态结构

Abstract: The results of 1H NMR investigation of α-cyclodextrin inclusions with p-and m-cresol in heavy water are reported in this paper. It was found that though there is difference in chemical shift of some protons in α-cyclodextrin cavity between after and before complexing with cresol, only singlet resonance peak had been detected by 1H NMR, position of which was dependent upon the inclusive degree. The average geometrical structures of inclusion complexes and their equilibrium constants under different inclusive degrees had been calculated based on 1H NMR data, and the situation of dynamic variation of entering depth of cresol into α-cyclodextrin cavity had been described. Meanwhile, the comparison of the above results of α-cyclodextrin with β-cyclodextrin are made in this paper.

Key words: cyclodextrin, Cresol, 1H NMR, Inclusion, Binding equilibrium, Dynamic structure