Enantiodifferentiation in jet-cooled van der Waals complexes of chiral molecules

✍ Scribed by A.R. Al-Rabaa; E. Bréhéret; F. Lahmani; A. Zehnacker

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 364 KB
• Volume: 237
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(95)00329-3

✦ Synopsis

Laser-induced fluorescence excitation spectroscopy in a supersonic expansion is used to evidence intermolecular chiral discrimination at the microscopic level. Measurements have been performed in (R)-(+)-and (S)-(-)-et-methyl-2-naphthalenemethanol (a naphthalene compound made chiral by the asymmetric carbon in the 2 position) in the presence of alcoholic solvents (methanol, 1-propanol, and (S)-(+)-chloro-l-propanol). While identical spectral shifts are observed for 1:1 complexes of (R)-(+)-and (S)-(-)-ot-methyl-2-naphthalenemethanol with non-chiral solvents, complexation of each enantiomer with the chiral (S)-( + )-2-chloro-l-propanol molecule gives rise to different solvent shifts and allows differentiation between the two forms in the racemic mixture.