Jump to main content
Jump to site search

Issue 32, 2015
Previous Article Next Article

Temperature sensitive supramolecular self assembly of per-6-PEO-β-cyclodextrin and α,ω-di-(adamantylethyl)poly(N-isopropylacrylamide) in water

Author affiliations

Abstract

The host/guest interactions in water of a star polymer consisting of a β-cyclodextrin (β-CD) core bearing six poly(ethylene oxide) arms linked to the C6 positions of β-CD (β-CD-PEO7, Mn 5000 g mol−1) and α,ω-di-(adamantylethyl)poly(N-isopropylacrylamide) (Ad-PNIPAM-12K, Mn 12 000 g mol−1) were studied by 1D and 2D 1H and 13C NMR spectroscopy, isothermal calorimetry (ITC), and light scattering (LS). In cold water (T < 26 °C) supramolecular “dumbbell” assemblies, consisting of PNIPAM chains with β-CD/Ad inclusion complexes at each end, formed via β-CD-insertion of the terminal Ads through the β-CD secondary face. Light scattering, microcalorimetry (DSC), and DOSY NMR studies indicated that mixed aqueous solutions of β-CD-PEO7 and Ad-PNIPAM-12K undergo a reversible heat-induced phase transition at ∼32 °C, accompanied by a release of a fraction of the Ad-bound β-CD-PEO7 into bulk solution and the formation of aggregated Ad-PNIPAM-12K stabilized by a β-CD-PEO7 shell.

Graphical abstract: Temperature sensitive supramolecular self assembly of per-6-PEO-β-cyclodextrin and α,ω-di-(adamantylethyl)poly(N-isopropylacrylamide) in water

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 May 2015, accepted on 02 Jul 2015 and first published on 02 Jul 2015


Article type: Paper
DOI: 10.1039/C5SM01293G
Author version available: Download Author version (PDF)
Citation: Soft Matter, 2015,11, 6432-6443
  •   Request permissions

    Temperature sensitive supramolecular self assembly of per-6-PEO-β-cyclodextrin and α,ω-di-(adamantylethyl)poly(N-isopropylacrylamide) in water

    V. Bennevault, C. Huin, P. Guégan, K. Evgeniya, X.-P. Qiu and F. M. Winnik, Soft Matter, 2015, 11, 6432
    DOI: 10.1039/C5SM01293G

Search articles by author

Spotlight

Advertisements