A kinetic study of the reactions FeO+ + O, Fe+.N2 + O, Fe+.O2 + O and FeO+ + CO: implications for sporadic E layers in the upper atmosphere

Physical Chemistry Chemical Physics : PCCP
K R I WoodcockJohn M C Plane

Abstract

These gas-phase reactions were studied by pulsed laser ablation of an iron target to produce Fe(+) in a fast flow tube, with detection of the ions by quadrupole mass spectrometry. Fe(+).N(2) and Fe(+).O(2) were produced by injecting N(2) and O(2), respectively, into the flow tube. FeO(+) was produced from Fe(+) by addition of N(2)O, or by ligand-switching from Fe(+).N(2) following the addition of atomic O. The following rate coefficients were measured: k(FeO(+) + O --> Fe(+) + O(2), 186-294 K) = (3.2 +/- 1.5) x 10(-11); k(Fe(+).N(2) + O --> FeO(+)+ N(2), 294 K) = (4.6 +/- 2.5) x 10(-10); k(Fe(+).O(2) + O --> FeO(+) + O(2), 294 K) = (6.3 +/- 2.7) x 10(-11); and k(FeO(+) + CO --> Fe(+) + CO(2), 294 K) = (1.59 +/- 0.34) x 10(-10) cm(3) molecule(-1) s(-1), where the quoted uncertainties are a combination of the 1sigma standard errors in the kinetic data and the systematic experimental errors. The surprisingly slow reaction between FeO(+) and O is examined using ab initio quantum calculations of the relevant potential energy surfaces. The importance of this reaction for controlling the lifetime of sporadic E layers is then demonstrated using a model of the upper mesosphere and lower thermosphere.

References

Dec 11, 2003·Chemical Reviews·John M C Plane
Apr 17, 2004·Science·John M C PlaneChester S Gardner
Nov 20, 2004·The Journal of Chemical Physics·Vitali ZhaunerchykPeter Hlavenka
Mar 10, 2005·Journal of the American Chemical Society·Voislav BlagojevicDiethard K Bohme
Jan 6, 2006·The Journal of Chemical Physics·Ricardo B MetzStephen R Leone
Dec 7, 2005·Physical Chemistry Chemical Physics : PCCP·Benjamin J Murray, John M C Plane

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Citations

Jan 11, 2012·The Journal of Physical Chemistry. a·John M C Plane, Charlotte L Whalley
Feb 10, 2011·Faraday Discussions·Charlotte L Whalley, John M C Plane
Sep 1, 2011·Journal of Atmospheric and Solar-terrestrial Physics·Martin FriedrichKlaus M Torkar
Aug 16, 2006·Physical Review Letters·Subir K DasKurt Binder
Apr 16, 2020·Physical Chemistry Chemical Physics : PCCP·David L BonesJohn M C Plane
Jan 27, 2019·Physical Chemistry Chemical Physics : PCCP·Shane M DalyJohn M C Plane
Jun 1, 2013·Physical Chemistry Chemical Physics : PCCP·Joshua J MelkoAlbert A Viggiano
Jun 9, 2012·Chemical Society Reviews·John M C Plane
May 21, 2010·The Journal of Physical Chemistry. a·Emilio Martínez-NúñezJohn M C Plane
Jul 19, 2008·The Journal of Physical Chemistry. a·Detlef Schröder
Dec 21, 2016·The Journal of Physical Chemistry. a·Joshua J MelkoAlbert A Viggiano
Mar 10, 2015·Chemical Reviews·John M C PlaneErin C M Dawkins

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