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Sarah Angelos, Ying-Wei Yang, Kaushik Patel, J. Fraser Stoddart and Jeffrey I. Zink pH-Responsive Supramolecular Nanovalves Based on Cucurbit[6]uril Pseudorotaxanes Angewandte Chemie International Edition 47

Version of Record online: 14 FEB 2008 | DOI: 10.1002/anie.200705211

Thumbnail image of graphical abstract

An open and closed case: pH-controllable nanovalves that operate in water have been produced by attaching [2]pseudorotaxanes to the surface of mesoporous silica nanoparticles. The nanovalves are able to contain guest molecules (rhodamine B, red circles) within the nanopores at acidic and neutral pH values but release them on command when the pH value is raised (see picture).

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