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PUBLICATIONS

Threading and Unthreading of Pseudorotaxanes of PEG/Acyclodextrin

Published

Author(s)

Barry J. Bauer, Da-Wei Liu

Abstract

The threading and unthreading kinetics of alpha-cyclodextrin onto polyethylene glycol is measured by small angle neutron scattering and gel permeation chromatography. The threading is autocatalytic, once threading of a PEG chain is started, it rapidly becomes fully threaded. Fully threaded chains associate, forming a separate phase. Upon heating, dilution, or addition of a good solvent the dethreading is extremely rapid, giving complete dethreading. Since the alpha-cyclodextrin molecule fits closely around a PEG molecule, stearic reasons alone cannot account for slow dethreading of pseutorotaxanes, and other effects such as strong ring-chain interactions must be present.
Citation
Polymer Preprints
Pub Type
Journals

Keywords

cyclodextrine, GPC, kinetics, PEG, rotaxane, SANS

Citation

Bauer, B. and Liu, D. (2008), Threading and Unthreading of Pseudorotaxanes of PEG/Acyclodextrin, Polymer Preprints (Accessed October 15, 2025)

Issues

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Created October 16, 2008
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