H2 roaming chemistry and the formation of H3+ from organic molecules in strong laser fields

Nagitha Ekanayake, Travis Severt, Muath Nairat, Nicholas P. Weingartz, Benjamin M. Farris, Balram Kaderiya, Peyman Feizollah, Bethany Jochim, Farzaneh Ziaee, Kurtis Borne, Kanaka Raju P., Kevin D. Carnes, Daniel Rolles, Artem Rudenko, Benjamin G. Levine, James E. Jackson, Itzik Ben-Itzhak and Marcos Dantus ()
Additional contact information
Nagitha Ekanayake: Michigan State University
Travis Severt: Kansas State University
Muath Nairat: Michigan State University
Nicholas P. Weingartz: Michigan State University
Benjamin M. Farris: Michigan State University
Balram Kaderiya: Kansas State University
Peyman Feizollah: Kansas State University
Bethany Jochim: Kansas State University
Farzaneh Ziaee: Kansas State University
Kurtis Borne: Kansas State University
Kanaka Raju P.: Kansas State University
Kevin D. Carnes: Kansas State University
Daniel Rolles: Kansas State University
Artem Rudenko: Kansas State University
Benjamin G. Levine: Michigan State University
James E. Jackson: Michigan State University
Itzik Ben-Itzhak: Kansas State University
Marcos Dantus: Michigan State University

Nature Communications, 2018, vol. 9, issue 1, 1-11

Abstract: Abstract Roaming mechanisms, involving the brief generation of a neutral atom or molecule that stays in the vicinity before reacting with the remaining atoms of the precursor, are providing valuable insights into previously unexplained chemical reactions. Here, the mechanistic details and femtosecond time-resolved dynamics of H3+ formation from a series of alcohols with varying primary carbon chain lengths are obtained through a combination of strong-field laser excitation studies and ab initio molecular dynamics calculations. For small alcohols, four distinct pathways involving hydrogen migration and H2 roaming prior to H3+ formation are uncovered. Despite the increased number of hydrogens and possible combinations leading to H3+ formation, the yield decreases as the carbon chain length increases. The fundamental mechanistic findings presented here explore the formation of H3+, the most important ion in interstellar chemistry, through H2 roaming occurring in ionic species.

Date: 2018
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DOI: 10.1038/s41467-018-07577-0

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