Journal
TETRAHEDRON
Volume 68, Issue 5, Pages 1492-1501Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2011.12.015
Keywords
Water-soluble capsule; Electrostatic interaction; Hetero-capsule
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Funding
- MEXT of Japan [17750127]
- Kyoto Institute of Technology
- Grants-in-Aid for Scientific Research [17750127] Funding Source: KAKEN
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We now report the formation and characterization of water-soluble hetero-capsules 1.2 resulting from the ionic interactions between positively charged flexible aniline hydrochloride 1 and negatively charged phosphonate 2 having rigid homooxacalix[3]arene units. The formation of the molecular capsules was studied by NOESY, DOSY NMR spectroscopy and ESI-Mass spectrometry. The water solubility of the capsules is improved by the introduction of mono- or triethylene glycol substituents in the homooxacalix plarene-based phosphonate units 2. (C) 2011 Elsevier Ltd. All rights reserved.
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