Bundling Two Polymeric Chains with γ-Cyclodextrin Cavity Contributing to Supramolecular Network Formation

Autor:	Nobuhiko Yui, Masayuki Yamaguchi, Ryo Katoono, Ryouji Kawabata
Rok vydání:	2007
Předmět:	chemistry.chemical_classification Telechelic polymer Rotaxane Polymers and Plastics Cyclodextrin Chemistry Disulfide Linkage Organic Chemistry Supramolecular chemistry Inorganic Chemistry Gel permeation chromatography End-group Polymer chemistry Materials Chemistry Moiety
Zdroj:	Macromolecules. 40:1011-1017
ISSN:	1520-5835 0024-9297
Popis:	Poly(oxyethylene) (PEO) containing a 4,4‘-diaminodiphenylmethane moiety with thiol groups at the terminals (1SH) and its inclusion complexes with γ- and β-cyclodextrins (γ- and β-CDs) (2SH and 3SH) were prepared. 1H NMR spectroscopy indicated that the two molecules of 1SH were bundled with γ-CD through intermolecular interaction in 2SH while the only one molecule was included with β-CD in 3SH. The polymer 1SH and the complexes 2SH and 3SH were chain-extended by disulfide linkage formation through oxidation reaction (1SS, 2SS, and 3SS, respectively). All of the complexes were confirmed by using gel permeation chromatography and viscosity measurement. Significant increases in the viscosity were observed for 2SH and 2SS, compared with 1SH, 3SH and 1SS, 3SS, respectively. It is suggested that the double-stranded inclusion complexation of the PEO chains by γ-CD like the bundling with its cavity acts as a cross-link and contributes to network formation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0893944d87b5e086e374e169f05f823f https://doi.org/10.1021/ma062669h Zobrazit plný text záznamu