物理化学学报 >> 2005, Vol. 21 >> Issue (10): 1174-1177.doi: 10.3866/PKU.WHXB20051023

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β-环糊精对聚氧乙烯十二烷基醚的双模式包结作用

杜新贞; 孙延春; 周嵘; 王亚荣; 陶小娟   

  1. 西北师范大学化学系, 兰州 730070
  • 收稿日期:2005-02-24 修回日期:2005-04-22 发布日期:2005-10-15
  • 通讯作者: 杜新贞 E-mail:duxz@nwnu.edu.cn

Dual Inclusional Modes of β-cyclodextrin with Polyoxyethylene Lauryl Ether

DU Xin-zhen; SUN Yan-chun; ZHOU Rong; WANG Ya-rong; TAO Xiao-juan   

  1. Department of Chemistry, Northwest Normal University, Lanzhou 730070
  • Received:2005-02-24 Revised:2005-04-22 Published:2005-10-15
  • Contact: DU Xin-zhen E-mail:duxz@nwnu.edu.cn

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摘要： 通过表面张力法、浊点法、硫氰酸钴铵显色法和1H NMR研究了β-环糊精(β-CD)对聚氧乙烯十二烷基醚(PL)的包结作用. 结果表明, β-CD可与PL形成2∶1和3∶1型两种超分子包结物, 表现出不同的物理化学性质. PL的疏水性烷基链被包络进β-CD空腔中, 形成了2∶1的超分子包结物；PL的亲水性聚氧乙烯基链被包络进β-CD空腔中, 形成了3∶1的超分子包结物. 结合实验结果, 通过比较β-CD和PL分子的大小, 提出了β-CD对PL分子两种可能的包结模式.

关键词: β-环糊精, 聚氧乙烯十二烷基醚, 表面张力, 浊点, 1H NMR, 超分子包结物

Abstract: Inclusion of β-cyclodextrin (β-CD) with polyoxyethylene lauryl ether (PL) was studied by surface tension, cloud point, color reaction and 1H NMR measurements. It was established that the inclusion of β-CD with PL affords supramolecular complexes with stoichiometric ratios of 2∶1 and 3∶1 in aqueous solution. Inclusion complex with the stoichiometry of 2∶1 arises from the incorporation of lauryl group of PL into the cavity of β-CD, whereas inclusion complex with the stoichiometry of 3∶1 arises from the incorporation of polyoxyethylene group of PL into the cavity of β-CD. A special configuration of the complex has been proposed based on experimental results and molecular sizes.

Key words: β-Cyclodextrin, PL, Surface tension, Cloud point, 1H NMR, Supramolecular inclusion complex