Gold Nanoparticles in Organic Capsules: A Supramolecular Assembly of Gold Nanoparticles and Cucurbituril

Gold nanoparticles (≤1 nm) have been encapsulated inside cucurbit[7]uril (CB[7]) by vapor deposition or chemical reduction in aqueous solutions. CB[7] has unique host properties compared with CB[5] and CB[6]. The particle size distribution obtained with CB[5] and CB[6] is similar to that obtained in...

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Bibliographic Details
Published in:Chemistry : a European journal 2007-01, Vol.13 (22), p.6359-6364
Main Authors: Corma, Avelino, García, Hermenegildo, Montes-Navajas, Pedro, Primo, Ana, Calvino, José Juan, Trasobares, Susana
Format: Article
Language:English
Subjects:
capsules
cucurbiturils
gold
nanoparticles
supramolecular chemistry
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Summary:Gold nanoparticles (≤1 nm) have been encapsulated inside cucurbit[7]uril (CB[7]) by vapor deposition or chemical reduction in aqueous solutions. CB[7] has unique host properties compared with CB[5] and CB[6]. The particle size distribution obtained with CB[5] and CB[6] is similar to that obtained in the absence of CBs and the particles obtained are much too large to be incorporated inside the organic capsules. When gold nanoparticles are prepared inside CB[7] the resulting supramolecular assembly has shape‐selective properties for gold interactions with amines, cyanide, and quaternary ammonium ions. Thus, CB[7] has the potential to be used in applications such as selective adsorption, sensing, and catalysis. Capturing gold: Gold nanoparticles (≤1.0 nm) were encapsulated in cucurbit[7]uril (see figure). The resulting supramolecular assembly shows shape selectivity towards organic probes.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.200601900