Comment on “Role of (NO)2 Dimer in Reactions of Fe+ with NO and NO2 Studied by ICP-SIFT Mass Spectrometry”

Melko, Joshua J.; Ard, Shaun G.; Fournier, Joseph A.; Shuman, Nicholas S.; Troe, J.; Viggiano, Albert A.

doi:10.1021/jp404945p

Cited by 2 publications

(3 citation statements)

References 24 publications

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“…[49][50][51] The previously reported formation of SmO + from reaction with NO was not observed, which is consistent with similar differences in NO reactivity that have been reported previously for other metals. [52][53][54][55] Table I shows that the efficiencies of these reactions show no clear correlation with the LO bond energy and therefore the reaction exothermicity. The temperature dependences are typical for exothermic reactions such as these.…”

Section: Sift Resultsmentioning

confidence: 99%

Evaluation of the exothermicity of the chemi-ionization reaction Sm + O → SmO+ + e−

Cox

Kim

Armentrout

et al. 2015

The Journal of Chemical Physics

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The exothermicity of the chemi-ionization reaction Sm + O → SmO(+) + e(-) has been re-evaluated through the combination of several experimental methods. The thermal reactivity (300-650 K) of Sm(+) and SmO(+) with a range of species measured using a selected ion flow tube-mass spectrometer apparatus is reported and provides limits for the bond strength of SmO(+), 5.661 eV ≤ D0(Sm(+)-O) ≤ 6.500 eV. A more precise value is measured to be 5.725 ± 0.07 eV, bracketed by the observed reactivity of Sm(+) and SmO(+) with several species using a guided ion beam tandem mass spectrometer (GIBMS). Combined with the established Sm ionization energy (IE), this value indicates an exothermicity of the title reaction of 0.08 ± 0.07 eV, ∼0.2 eV smaller than previous determinations. In addition, the ionization energy of SmO has been measured by resonantly enhanced two-photon ionization and pulsed-field ionization zero kinetic energy photoelectron spectroscopy to be 5.7427 ± 0.0006 eV, significantly higher than the literature value. Combined with literature bond energies of SmO, this value indicates an exothermicity of the title reaction of 0.14 ± 0.17 eV, independent from and in agreement with the GIBMS result presented here. The evaluated thermochemistry also suggests that D0(SmO) = 5.83 ± 0.07 eV, consistent with but more precise than the literature values. Implications of these results for interpretation of chemical release experiments in the thermosphere are discussed.

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Section: Sift Resultsmentioning

confidence: 99%

Evaluation of the exothermicity of the chemi-ionization reaction Sm + O → SmO+ + e−

Cox

Kim

Armentrout

et al. 2015

The Journal of Chemical Physics

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“…This and other similar results clearly demonstrate the occurrence of second-order chemistry (in NO) either by sequential collisions with NO or collisions with (NO) 2 dimer. Apparent trends in reaction efficiency of individual channels and ratios in k (NO)/ k (NO 2 ) as identified by Vetal 2013 therefore should be interpreted with this in mind. The situation can be somewhat complex if NO 2 impurities and second-order chemistry (either by two sequential NO collisions or by collision with (NO) 2 dimer) occur concomitantly.…”

Section: Role Of Second-order No Chemistry In the No Experimentsmentioning

confidence: 94%

“…We respond here to the Comment of Melko et al, henceforth designated as Vetal 2013, that has critiqued our recent publication on the “Role of (NO) 2 Dimer in Reactions of Fe + with NO and NO 2 Studied by ICP-SIFT Mass Spectrometry” . Our response is brief; the Supporting Information provides more detail.…”

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confidence: 93%

Reply to “Comment on ‘Role of (NO)₂ Dimer in Reactions of Fe⁺ with NO and NO₂ Studied by ICP-SIFT Mass Spectrometry’”

et al. 2013

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Comment on “Role of (NO)₂ Dimer in Reactions of Fe⁺ with NO and NO₂ Studied by ICP-SIFT Mass Spectrometry”

Cited by 2 publications

References 24 publications

Evaluation of the exothermicity of the chemi-ionization reaction Sm + O → SmO+ + e−

Evaluation of the exothermicity of the chemi-ionization reaction Sm + O → SmO+ + e−

Reply to “Comment on ‘Role of (NO)₂ Dimer in Reactions of Fe⁺ with NO and NO₂ Studied by ICP-SIFT Mass Spectrometry’”

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Comment on “Role of (NO)2 Dimer in Reactions of Fe+ with NO and NO2 Studied by ICP-SIFT Mass Spectrometry”

Cited by 2 publications

References 24 publications

Evaluation of the exothermicity of the chemi-ionization reaction Sm + O → SmO+ + e−

Evaluation of the exothermicity of the chemi-ionization reaction Sm + O → SmO+ + e−

Reply to “Comment on ‘Role of (NO)2 Dimer in Reactions of Fe+ with NO and NO2 Studied by ICP-SIFT Mass Spectrometry’”

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Comment on “Role of (NO)₂ Dimer in Reactions of Fe⁺ with NO and NO₂ Studied by ICP-SIFT Mass Spectrometry”

Reply to “Comment on ‘Role of (NO)₂ Dimer in Reactions of Fe⁺ with NO and NO₂ Studied by ICP-SIFT Mass Spectrometry’”