Neutron scattering reveals water confined in a watertight bilayer vesicle
Water molecules confined in a nanocavity possess distinctly different characteristics from those in bulk, yet the preparation of such nanocavities is still a major experimental challenge. We report here a self-assembled vesicle of an anionic perfluoroalkylated [60]fullerene, unique for its outstandi...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
August 17, 2018
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| In: |
Journal of the American Chemical Society
Year: 2018, Jahrgang: 140, Heft: 36, Pages: 11261-11266 |
| ISSN: | 1520-5126 |
| DOI: | 10.1021/jacs.8b04066 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1021/jacs.8b04066 |
| Verfasserangaben: | Wasim Abuillan, Alexandra S. Becker, Bruno Demé, Tatsuya Homma, Hiroyuki Isobe, Koji Harano, Eiichi Nakamura, and Motomu Tanaka |
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| 520 | |a Water molecules confined in a nanocavity possess distinctly different characteristics from those in bulk, yet the preparation of such nanocavities is still a major experimental challenge. We report here a self-assembled vesicle of an anionic perfluoroalkylated [60]fullerene, unique for its outstanding stability and water tightness, containing water not bound to the membranes. Small-angle neutron scattering revealed that a vesicle of 14 nm outer radius contains a 2 nm thick fullerene bilayer, inside of which is a 3 nm thick membrane-bound water and unbound water in the 4 nm innermost cavity. The vesicle shows astonishingly low water permeability that is 6 to 9 orders of magnitude smaller than that of a lipid vesicle. As a result, a single vesicle isolated on a substrate can retain the interior water in air or even under high vacuum, indicating that the vesicle cavity provides a new tool for physicochemical studies of confined water as well as ions and molecules dissolved in it. | ||
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