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Pubmed for Handhelds

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  • Title: Hydrogen-bonded capsules in water.
    Author: Zhang KD, Ajami D, Rebek J.
    Journal: J Am Chem Soc; 2013 Dec 04; 135(48):18064-6. PubMed ID: 24245649.
    Abstract:
    Hydrogen-bonded capsules constrain molecules into small spaces, where they exhibit behavior that is inaccessible in bulk solution. Water competes with the formation of hydrogen bonds, and other forces for assembly, such as metal/ligand interactions or hydrophobic effects, have been applied. Here we report the reversible assembly of a water-soluble cavitand to a robust capsule host in the presence of suitable hydrophobic guests. The complexes are characterized by conventional NMR methods. Selectivity for guest length and fluorescence quenching of a stilbene guest are used as evidence for hydrogen bonding in the capsule.
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