Molecular Recognition: Preparation of Polyrotaxan and Tubular Polymer from Cyclodextrin

✍ Scribed by Akira Harada; Jun Li; Mikiharu Kamachi

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 402 KB
• Volume: 8
• Category: Article
• ISSN: 1042-7147
• DOI: 10.1002/(sici)1099-1581(199704)8:4<241::aid-pat641>3.0.co;2-l

✦ Synopsis

We found that many ␣-CDs are threaded on a poly(ethylene glycol) (PEG) chain to form a crystalline complex in high yields, although ␤-CD did not form complexes with PEG. It was made clear that the relationship between the chain cross-sectional areas of the polymers and the diameters of the cavities of cyclodextrins is very important in the complex formation of polymers and cyclodextrins. Polyrotaxanes were prepared by the reaction of PEGbisamine (PEGBA), which is PEG with amino groups in both ends, with 2,4-dinitro-1-fluorobenzene. In addition, the molecular tubes, a new family of novel nanostructures, were prepared and characterized. These findings indicate that such template synthesis provides a new approach to construct new nanostrutures, which may have implications for molecular technologies and materials science