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; Omair Ghafur; Jason B. Greenwood; Dave Townsend

doi:10.1039/D2CP05880D

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, Omair Ghafur, Jason B. Greenwood, Dave Townsend

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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%.

Original language	English
Pages (from-to)	6009-6015
Number of pages	7
Journal	Physical Chemistry Chemical Physics
Volume	25
Issue number	8
Early online date	8 Feb 2023
DOIs	https://doi.org/10.1039/D2CP05880D
Publication status	Published - 28 Feb 2023

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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%.",

author = "Chris Sparling and Crane, {Stuart W.} and Lewis Ireland and Ross Anderson and Omair Ghafur and Greenwood, {Jason B.} and Dave Townsend",

note = "Funding Information: This work was made possible by Leverhulme Trust Research Project Grant RPG-2012-735, Carnegie Trust Research Incentive Grant 70264, and EPSRC Platform Grant (EP/P001459). We also thank Heriot-Watt University for providing C. S. and L. I. with PhD funding and R. A. with an undergraduate summer vacation bursary. Publisher Copyright: {\textcopyright} 2023 The Royal Society of Chemistry.",

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AU - Anderson, Ross

AU - Ghafur, Omair

AU - Greenwood, Jason B.

AU - Townsend, Dave

N1 - Funding Information: This work was made possible by Leverhulme Trust Research Project Grant RPG-2012-735, Carnegie Trust Research Incentive Grant 70264, and EPSRC Platform Grant (EP/P001459). We also thank Heriot-Watt University for providing C. S. and L. I. with PhD funding and R. A. with an undergraduate summer vacation bursary. Publisher Copyright: © 2023 The Royal Society of Chemistry.

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N2 - 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%.

AB - 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%.

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Velocity-map imaging of photoelectron circular dichroism in non-volatile molecules using a laser-based desorption source

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