Fast and precise chiroptical spectroscopy by photoelectron elliptical dichroism - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Chemistry Chemical Physics Année : 2023

Fast and precise chiroptical spectroscopy by photoelectron elliptical dichroism

Résumé

The photoionization of chiral molecules by elliptically polarized femtosecond laser pulses produces photoelectron angular distributions which show a strong and enantio-sensitive forward/backward asymmetry along the light propagation direction. We report on high precision measurements of this photoelectron elliptical dichroism (PEELD). Using an optical cavity to recycle the laser pulses and increase the signal-to-noise ratio, we determine enantiomeric excesses with a 0.04% precision with a low-power femtosecond laser (4 W) in a compact scheme. We perform momentum-resolved PEELD measurements in 16 molecules, from volatile terpenes to non-volatile amino acids and large iodoarenes. The results demonstrate the high structural sensitivity of PEELD, confirming the spectroscopic interest of this technique. Last, we show how a convolutional neural network can be used to retrieve the chemical and enantiomeric composition of a sample from the momentum-resolved PEELD maps
Fichier principal
Vignette du fichier
2023_Comby_PCCP_Photoelectron elliptical dichroism.pdf (7.07 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04197068 , version 1 (18-10-2023)
hal-04197068 , version 2 (14-12-2023)

Identifiants

Citer

Antoine Comby, Dominique Descamps, Stéphane Petit, Emmanuel Valzer, Morgan Wloch, et al.. Fast and precise chiroptical spectroscopy by photoelectron elliptical dichroism. Physical Chemistry Chemical Physics, 2023, 25 (24), pp.16246-16263. ⟨10.1039/D3CP01057K⟩. ⟨hal-04197068v2⟩
43 Consultations
11 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More