Effect of end groups on complexation kinetics between cyclodextrins and guest polymers

✍ Scribed by Jie Xue; Liang Chen; Li Zhou; Zhifeng Jia; Yanping Wang; Xinyuan Zhu; Deyue Yan

• Book ID: 105338346
• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 151 KB
• Volume: 44
• Category: Article
• ISSN: 0887-6266
• DOI: 10.1002/polb.20869

✦ Synopsis

Abstract

α‐Cyclodextrin (α‐CD) has been complexed with various poly(ethylene glycol) (PEG) derivatives in aqueous solution. It has been found that the end groups of PEG derivatives affect the complexation kinetics greatly, but have only a little influence on the thermodynamic behavior. By increasing the hydrophobicity of end groups, the complexation speeds up rapidly. On the other hand, the bulky end groups slow down the threading of polymeric guests into the cavity of CD. By changing the hydrophobicity and the size of end groups, the complexation rate can be adjusted in the range of several orders of magnitudes, which should be quite useful in the design of new supramolecular systems. © 2006 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 44: 2050–2057, 2006