Heterosupramolecular Chemistry: Recognition Initiated and Inhibited Silver Nanocrystal Aggregation by Pseudorotaxane Assembly
Journal of the American Chemical Society2000Vol. 122(26), pp. 6252–6257
Citations Over TimeTop 10% of 2000 papers
Declan Ryan, S. Nagaraja Rao, Håkan Rensmo, Donald Fitzmaurice, Jon A. Preece, Sabine Wenger, J. Fraser Stoddart, Nelsi Zaccheroni
Abstract
Near size-monodisperse silver nanocrystals stabilized by chemisorption of a mixture of an alkane thiol (85%) and an alkane thiol incorporating a dibenzo-24-crown-8 moiety (15%) have been prepared. Using dynamic light scattering and nuclear magnetic resonance, it is shown that addition of bis-dibenzylammonium dication initiates aggregation of the silver nanocrystal dispersion by pseudorotaxane assembly. It is also shown that addition of excess dibenzylammonium cation or dibenzo-24-crown-8 inhibits further aggregation. This novel demonstration of controlled nanocrystal aggregation points the way toward the programmed assembly of complex nanocrystal architectures in solution.
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