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| - Photophysical Studies on Molecular Chirality: Ground and Excited State EnantioselectiveInteractions between 2-Naphthyl-1-ethanol and Natural Bicyclic Compounds
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| - Jet-cooled isolated diastereoisomeric pairs formed between R- and S-2-naphthyl-1-ethanol and a series ofoptically active terpenes have been investigated by studying both the fluorescence excitation spectra and thefluorescence decays. While the homo- and heterochiral complexes with α-pinene and borneol can be resolvedspectrally, no spectral enantiodifferentiation was obtained in the case of camphene and camphor complexes.Chirality-dependent fluorescence decays were however observed for these complexes which exhibit eitherlonger lifetimes than the bare chromophore for the diasteroisomers involving camphene, or shorter for thosewith camphor. The enantioselective quenching of fluorescence of 2-naphthylethanol by R- and S-camphorhas also been observed in n-hexane solution and has been shown to be due to a singlet−singlet energy transfertaking place at a rate lower than diffusion. In contrast, the energy transfer to R- and S-camphorquinone andbiacetyl was shown to be diffusion controlled and nonenantioselective.
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