Title :

Search for Resolution of Chiral Fluorohalogenomethanes and Parity‐Violation Effects at the Molecular Level

Author(s) :

Crassous, Jeanne [Auteur]
Laboratoire de Chimie - UMR5182 [LC]
Monier, Franck [Auteur]
Dutasta, Jean‐pierre [Auteur]
Ziskind, Michaël [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Daussy, Christophe [Auteur]
Université Paris 13 [UP13]
Université Sorbonne Paris Nord
Laboratoire de Physique des Lasers [LPL]
Grain, Christophe [Auteur]
Laboratoire de Physique des Lasers [LPL]
Chardonnet, Christian [Auteur]
Laboratoire de Physique des Lasers [LPL]

Journal title :

ChemPhysChem

Pages :

541-548

Publisher :

Wiley-VCH Verlag

Publication date :

2003-06-06

ISSN :

1439-4235

HAL domain(s) :

Physique [physics]

English abstract : [en]

Abstract The first observation of a parity‐violation effect in molecules induced by weak interactions is still a dream that requires the synthesis and, eventually, the resolution of the enantiomers of well‐chosen simple ...
Show more >Abstract The first observation of a parity‐violation effect in molecules induced by weak interactions is still a dream that requires the synthesis and, eventually, the resolution of the enantiomers of well‐chosen simple chiral molecules together with an appropriate experimental set‐up for high‐resolution spectroscopy. Performing IR spectroscopy on highly enantiomerically enriched samples of bromochlorofluoromethane succeeded in giving an upper limit of 10 −13 for the relative vibrational energy difference between the two enantiomers. These results led us to conceive a new experimental set‐up based on a supersonic molecular beam and to work on other chiral molecules, such as chlorofluoroiodomethane. A synthesis of (±)‐CHClFI from racemic chlorofluoroiodoacetic acid should, in the near future permit the preparation of optically active samples of this haloform. The development of molecular beam spectroscopy using a two‐photon Ramsey‐fringes experiment should allow us to reach the precision needed to observe parity violation. These experimental challenges, which stimulate a close collaboration between chemists and physicists, are presented. The success of these projects would open the route to new information on the molecular Hamiltonian, a better knowledge of the electroweak interaction, and a better control of the various chirality‐related properties of simple molecules.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523

Source :

Harvested from HAL