Wavelength dependent photoelectron circular dichroism of limonene studied by femtosecond multiphoton laser ionization and electron-ion coincidence imaging

Enantiomers of the monoterpene limonene have been investigated by (2 + 1) resonance enhanced multiphoton ionization and photoelectron circular dichroism employing tuneable, circularly polarized femtosecond laser pulses. Electron imaging detection provides 3D momentum measurement while electron-ion c...

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Veröffentlicht in:The Journal of chemical physics 2016-09, Vol.145 (12), p.124320-124320
Hauptverfasser: Rafiee Fanood, Mohammad M., Janssen, Maurice H. M., Powis, Ivan
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container_title The Journal of chemical physics
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creator Rafiee Fanood, Mohammad M.
Janssen, Maurice H. M.
Powis, Ivan
description Enantiomers of the monoterpene limonene have been investigated by (2 + 1) resonance enhanced multiphoton ionization and photoelectron circular dichroism employing tuneable, circularly polarized femtosecond laser pulses. Electron imaging detection provides 3D momentum measurement while electron-ion coincidence detection can be used to mass-tag individual electrons. Additional filtering, by accepting only parent ion tagged electrons, can be then used to provide discrimination against higher energy dissociative ionization mechanisms where more than three photons are absorbed to better delineate the two photon resonant, one photon ionization pathway. The promotion of different vibrational levels and, tentatively, different electronic ion core configurations in the intermediate Rydberg states can be achieved with different laser excitation wavelengths (420 nm, 412 nm, and 392 nm), in turn producing different state distributions in the resulting cations. Strong chiral asymmetries in the lab frame photoelectron angular distributions are quantified, and a comparison made with a single photon (synchrotron radiation) measurement at an equivalent photon energy.
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source MEDLINE; AIP Journals Complete; Alma/SFX Local Collection
subjects Circular Dichroism
Circular polarization
Cyclohexenes - chemistry
Dichroism
Electron imaging
Electrons
Enantiomers
Femtosecond pulses
Filtration
Ionization
Lasers
Models, Molecular
Molecular Conformation
Optical Imaging
Photons
Physics
Rydberg states
Stereoisomerism
Synchrotron radiation
Terpenes - chemistry
title Wavelength dependent photoelectron circular dichroism of limonene studied by femtosecond multiphoton laser ionization and electron-ion coincidence imaging
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