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Proceedings Paper

Resonant two-photon ionization of chiral molecules
Author(s): Anna Giardini-Guidoni; A. Latini; Mauro Satta; S. Piccirillo; T. M. Di Palma
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Paper Abstract

In the present investigation the properties and the structures of (R)-(+)-1-phenyl-1-propanol molecule (PR), pure or clustered with chiral and non chiral molecules is reported. The studies have been accomplished in jet- cooled environment using mass selected R2PI excitation and ionization spectroscopy. It has been shown that this technique allows to study chiral molecules and to enantiodifferentiate the homo and heteroclusters. The different shift of the band origins of the molecular diasteroeomeric complexes relative to that of the bare PR provides a means for spectroscopically discriminating the clusters. Measurements of threshold ionization and fragmentation spectra of the bare molecule and the clusters with chiral alcohols, n-butanol and H2O allows to determine electronic ground state binding energy of these clusters and their ions. The analysis of the spectra, together with preliminary ab-initio calculations, gives information on the cluster structures. The calculations confirm that the difference in binding energy of these clusters depends on a balance between electrostatic and dispersive forces.

Paper Details

Date Published: 25 February 2000
PDF: 7 pages
Proc. SPIE 4070, ALT '99 International Conference on Advanced Laser Technologies, (25 February 2000); doi: 10.1117/12.378192
Show Author Affiliations
Anna Giardini-Guidoni, Univ. degli Studi di Roma La Sapienza and Istituto Materiali Speciali (Italy)
A. Latini, Univ. degli Studi di Roma La Sapienza (Italy)
Mauro Satta, Univ. degli Studi di Roma La Sapienza (Italy)
S. Piccirillo, Univ. degli Studi di Roma Tor Vergata (Italy)
T. M. Di Palma, Istituto Materiali Speciali (Italy)


Published in SPIE Proceedings Vol. 4070:
ALT '99 International Conference on Advanced Laser Technologies

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