Molecular Reaction Flasks

  • Author: Anne Deveson
  • Published Date: 03 September 2012
  • Source / Publisher: Chemistry – A European Journal/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
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Water-soluble, dynamic hemicarcerands capsules that self-assemble in water from two cavitands and four diamines upon addition of a suitable, templating, guest molecule can be used as molecular reaction flasks (pictured). As a consequence of guest confinement, reactions carried out inside molecular capsules often proceed in a different manner compared to the bulk.

Ralf Warmuth and co-workers, Department of Chemistry and Chemical Biology, Rutgers, New Brunswick, USA, have developed a rational design concept for the multicomponent assembly of polycavitand nanocapsules by using dynamic covalent chemistry.
Photolysis of an "imprisoned" diazirine inside a hemicarcerand capsule yielded the Bredt olefin. It survives for days at room temperature protected from dimerization or reaction with solvent by the surrounding capsule.

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Magazine of Chemistry Europe (16 European Chemical Societies)published by Wiley-VCH