Report/Journal Article

PUBDB-2018-02134

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Observation of different reactivities of para and ortho-water towards trapped diazenylium ions

Kilaj, A. ; Gao, H. ; Rösch, D. ; Rivero, U. ; Küpper, J.CFEL*DESY* ; Willitsch, S. (Corresponding author)

2018
Nature Publishing Group London

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Please use a persistent id in citations: doi:10.1038/s41467-018-04483-3  doi:10.3204/PUBDB-2018-02134

Report No.: arXiv:1804.05925

Abstract: Water is one of the most fundamental molecules in chemistry, biology and astrophysics. It exists as two distinct nuclear-spin isomers, para- and ortho-water, which do not interconvert in isolated molecules. The experimental challenges in preparing pure samples of the two isomers have thus far precluded a characterization of their individual chemical behavior. Capitalizing on recent advances in the electrostatic deflection of polar molecules, we separate the ground states of para- and ortho-water in a molecular beam to show that the two isomers exhibit different reactivities in a prototypical reaction with trapped diazenylium ions. Based on ab initio calculations and a modelling of the reaction kinetics using rotationally adiabatic capture theory, we rationalize this finding in terms of different rotational averaging of ion-dipole interactions during the reaction.

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Research Program(s):

1. 6211 - Extreme States of Matter: From Cold Ions to Hot Plasmas (POF3-621) (POF3-621)
2. CUI - Hamburger Zentrum für ultraschnelle Beobachtung (194651731) (194651731)
3. IVF - Impuls- und Vernetzungsfonds (IVF-20140101) (IVF-20140101)

Experiment(s):

1. Experiments at CFEL
2. Measurement at external facility

Appears in the scientific report 2018

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