Velocity-map imaging of photoelectron circular dichroism in non-volatile molecules using a laser-based desorption source
Chris Sparling, Stuart W. Crane, Lewis Ireland, Ross Anderson, O. Ghafur, J. B. Greenwood, Dave Townsend
Abstract
We present an initial demonstration of a velocity-map imaging (VMI) experiment using a back-irradiation laser-based desorption source directly integrated into the electrode assembly. This has the potential to greatly expand the utility of the popular VMI approach by permitting its use with high density plumes of non-volatile molecular samples. Photoelectron circular dichroism measurements on the phenylalanine molecule using 400 nm multiphoton ionization are used to illustrate this novel method, revealing forward-backward emission asymmetries on the order of 7%.
Topics & Concepts
DesorptionCircular dichroismLaserVibrational circular dichroismMoleculeAnalytical Chemistry (journal)X-ray photoelectron spectroscopyChemistryMaterials scienceOpticsNuclear magnetic resonanceCrystallographyPhysicsPhysical chemistryChromatographyAdsorptionOrganic chemistryMolecular spectroscopy and chiralityMass Spectrometry Techniques and ApplicationsSpectroscopy and Quantum Chemical Studies