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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,...
Knowledge of the photophysics of the green fluorescent protein (GFP) underpins its exploitation in bioimaging. Some aspects of the fluorescence dynamics remain incompletely understood. The wavelength resolved ultrafast fluorescence of wtGFP and the mutant T203V are studied here as a function of excitation wavelength. These results allow us to address some of these unexplained phenomena. The apparently...
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