Competitive reaction and quenching of vibrationally excited O2+ ions with SO2, CH4, and H2O

Article abstract of DOI:10.1063/1.447975

Vibrationally excited O2⁺ ions injected into a He buffered flow tube react rapidly with SO2 and H2O by charge transfer and with CH4 to produce CH3O2⁺, CH3⁺, and CH4⁺.It is found that the rapidly reacting states at thermal energy are O2⁺ (ν<*>2) for SO2 and CH4 and O2⁺(ν<*>3) for H2O, while the lower vibrationally excited states are rapidly quenched.When the reactions of SO2 and CH4 are studied in Ar buffer as a function of kinetic energy it is found that the vibrational temperature of Oz established through collisional excitation by the Ar buffer is perturbed by quenching collisions with the reactant molecules.This leads to observed reaction rate constants that change with reactant gas concentration.For the reaction of O2⁺ with CH4 the influence of kinetic and vibrational energy on the branching ratio of the reaction channels has been investigated.The present vibrational relaxation data for O2⁺(ν) by CH4, in conjunction with other recent measurements, allows a rather detailed picture of the mechanism to be drawn for this complicated reaction that involves the making and breaking of four chemical bonds.

Full text of DOI:10.1063/1.447975

Competitive reaction and quenching of vibrationally excited O+ 2 ions with SO2, CH4,
and H2O
M. DurupFerguson, H. Böhringer, D. W. Fahey, F. C. Fehsenfeld, and E. E. Ferguson
Citation: The Journal of Chemical Physics 81, 2657 (1984); doi: 10.1063/1.447975
View online: http://dx.doi.org/10.1063/1.447975
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/81/6?ver=pdfcov
Published by the AIP Publishing
Articles you may be interested in
Rate constants for the reactions of metastable NO+ (a 3Σ+) ions with SO2, CO2, CH4, N2, Ar, H2, D2, and O2
at relative kinetic energies 0.04–2.5 eV
J. Chem. Phys. 71, 3280 (1979); 10.1063/1.438758
Quenching of vibrationally excited N2 by SO2
J. Chem. Phys. 68, 2014 (1978); 10.1063/1.435890
Excitation and quenching reactions in Ebeam excited He/H2O and He/CH3CN systems
J. Chem. Phys. 68, 538 (1978); 10.1063/1.435763
Erratum: Temperature dependence of the quenching of vibrationally excited N2 by NO and H2O
J. Chem. Phys. 67, 2398 (1977); 10.1063/1.435443
Chemiluminescence of CH in the O +C2H2 Reaction : Rotational Relaxation and Quenching
J. Chem. Phys. 46, 7 (1967); 10.1063/1.1840432
This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
142.157.212.147 On: Sun, 23 Nov 2014 15:37:56

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
142.157.212.147 On: Sun, 23 Nov 2014 15:37:56

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
142.157.212.147 On: Sun, 23 Nov 2014 15:37:56

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
142.157.212.147 On: Sun, 23 Nov 2014 15:37:56

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
142.157.212.147 On: Sun, 23 Nov 2014 15:37:56

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
142.157.212.147 On: Sun, 23 Nov 2014 15:37:56

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
142.157.212.147 On: Sun, 23 Nov 2014 15:37:56

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
142.157.212.147 On: Sun, 23 Nov 2014 15:37:56

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
142.157.212.147 On: Sun, 23 Nov 2014 15:37:56

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
142.157.212.147 On: Sun, 23 Nov 2014 15:37:56

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
142.157.212.147 On: Sun, 23 Nov 2014 15:37:56