NMR study of the reversible complexation of xenon by cucurbituril
SCIE
SCOPUS
- Title
- NMR study of the reversible complexation of xenon by cucurbituril
- Authors
- El Haouaj, M; Luhmer, M; Ko, YH; Kim, K; Bartik, K
- Date Issued
- 2001-01
- Publisher
- ROYAL SOC CHEMISTRY
- Abstract
- The interaction of xenon with cucurbituril, a synthetic receptor, in aqueous solutions is investigated by Xe-129 and H-1 NMR spectroscopy. Xenon is reversibly trapped into the cavity to form a 1:1 host-guest complex. The exchange between the free and the complexed xenon is slow on the Xe-129 NMR chemical shift time scale but fast on the H-1 NMR chemical shift time scale. The apparent association constant of xenon for cucurbituril can be obtained from analysis of the H-1 spectra and is estimated to be around 200 M-1 at 298 K. Interestingly, even though no H-bonding or electrostatic interactions play a role in the stabilisation of the complex, its stability is comparable to the stability of cucurbituril complexes with certain aryl- and alkyl-ammonium ions.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/11065
- DOI
- 10.1039/B008623L
- ISSN
- 1472-779X
- Article Type
- Article
- Citation
- JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2, no. 5, page. 804 - 807, 2001-01
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