物理化学学报 >> 2008, Vol. 24 >> Issue (04): 729-736.doi: 10.3866/PKU.WHXB20080433

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超分子中主体热分解行为的多样性分析——残存态环糊精的热分解

徐鹏; 宋乐新   

  1. 中国科学技术大学化学系, 合肥 230026
  • 收稿日期:2007-11-14 修回日期:2007-12-25 发布日期:2008-04-07
  • 通讯作者: 宋乐新 E-mail:solexin@ustc.edu.cn

Analysis of Thermal Decomposition Behavior Diversity of Host in a Supermolecule——Thermal Decomposition of Survived Cyclodextrin

XU Peng; SONG Le-Xin   

  1. Department of Chemistry, University of Science and Technology of China, Hefei 230026, P. R. China
  • Received:2007-11-14 Revised:2007-12-25 Published:2008-04-07
  • Contact: SONG Le-Xin E-mail:solexin@ustc.edu.cn

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摘要： 指出了只有在主-客体超分子化学中才能出现的主体热分解行为多样性现象, 提出了所谓的残存态主体(survived host)的概念. 残存态主体意指主-客体超分子失去客体后的产物, 它是由分子间弱相互作用所引起的主-客体包合现象的有力佐证. 以残存态环糊精(survived CD)为着眼点, 仔细比较了游离态CD、CD包合物即包结态CD与残存态CD的热分解行为差异性, 据此指出了有关文献在进行包结态CD热分解动力学计算时, 将残存态CD当成包结态CD来处理的一个概念错误.

关键词: 环糊精, 超分子, 包合物, 动力学, 热分解

Abstract: The diversity of thermal decomposition behavior of host in a host-guest supermolecule was described in detail. The concept of a survived host was given. A survived host means the product of a host-guest supermolecule losing its guest after heated. It served as a powerful evidence for the weak intermolecular interaction between host and guest in inclusion phenomenon. Focused on survived cyclodextrin (survived CD), the present work carefully compared the differences of thermal decomposition behavior among free CD, complexed CD, and survived CD, an dpointed out an important conceptual error which had occurred in some papers due to a lack of appreciation of the relationship between survived CD and complexed CD.

Key words: Cyclodextrin, Supermolecule, Inclusion complex, Kinetics, Thermal decomposition