Use of styrene radical cations as probes for the complexation dynamics of charged guests with alpha- and beta-cyclodextrins.
The complexation dynamics of radical cations with cyclodextrins (CD) was studied using photophysical techniques. Radical cations of 4-vinylanisole and trans-anethole were formed within alpha- and beta-CD cavities by two-photon photolysis of the respective styrene precursors. Exit of the radical cations from alpha-CD complexes with 1: 1 and 1:2 (guest: CD) stoichiometries and beta-CD complexes with 1:1 stoichiometries occurred with lifetimes shorter than 100 ns. Most of the radical cations formed escape from the CD cavities, but a small portion do react with alpha-CD when this host is present in high concentrations.
Murphy
R S
RS
Department of Chemistry, University of Victoria, B.C., Canada.
Bohne
C
C
D002412:Cations; D003505:Cyclodextrins / Q000737:chemistry*; D015335:Molecular Probes; D020058:Styrene / Q000737:chemistry*
D002412:Cations; D003505:Cyclodextrins; D015335:Molecular Probes; D020058:Styrene