Ultrafast reaction dynamics of auramine O in a cyclodextrin nanocavity

Kondo, Minako, Heisler, Ismael A. and Meech, Stephen R. ORCID: https://orcid.org/0000-0001-5561-2782 (2012) Ultrafast reaction dynamics of auramine O in a cyclodextrin nanocavity. Journal of Molecular Liquids, 176. pp. 17-21. ISSN 0167-7322

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The effect of confinement on a barrierless ultrafast chemical reaction is investigated through the ultrafast torsional reaction of the dye Auramine O bound in a cyclodextrin (CD) inclusion complex. The rate of the barrierless reaction is inferred from the ultrafast time evolution of the fluorescence emission. The rate is decreased on formation of the complex but in a highly size dependent fashion, with only β-CD yielding a significant effect. This reflects both the formation constant for the AuO-CD complex and the nature of the confinement. Even in the case of β-CD the effect of adsorption was smaller than was observed for adsorption of the same dye at the surfactant water interface. This shows that the structure and nature of the inclusion complex and is more important in determining the degree of rate retardation than the simple fact of confinement.

Item Type: Article
Uncontrolled Keywords: ultrafast,auramine o,cyclodextrin,inclusion complex,confined media,fluorescence
Faculty \ School: Faculty of Science > School of Chemistry
UEA Research Groups: Faculty of Science > Research Groups > Physical and Analytical Chemistry (former - to 2017)
Faculty of Science > Research Groups > Chemistry of Light and Energy
Faculty of Science > Research Groups > Centre for Photonics and Quantum Science
Depositing User: Pure Connector
Date Deposited: 03 Feb 2014 10:44
Last Modified: 21 Aug 2023 00:21
URI: https://ueaeprints.uea.ac.uk/id/eprint/47472
DOI: 10.1016/j.molliq.2012.06.006

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