A Remeasurement of the Products for Electron Recombination of N2H+ Using a New Technique: No Significant NH + N Production

Autor:	Viktoriya Poterya, Jason L. McLain, N. G. Adams, C. D. Molek
Rok vydání:	2007
Předmět:	Chemistry Ionization Reagent Analytical chemistry Physical and Theoretical Chemistry Quadrupole mass analyzer Product distribution Electron ionization Storage ring Recombination Afterglow
Zdroj:	The Journal of Physical Chemistry A. 111:6760-6765
ISSN:	1520-5215 1089-5639
DOI:	10.1021/jp068965d
Popis:	A remeasurement of the product distribution from dissociative electron-ion recombination (DR) of N 2 H + has been made using a new technique. The technique employs electron impact to ionize the neutral products prior to detection by a quadrupole mass analyzer. Two experimental approaches, both using pulsed gas techniques, isolate and quantify the DR products. In one approach, an electron-attaching gas is pulsed into a flowing afterglow to transiently quench DR. Results from this approach give an upper limit of 5% for the NH + N product channel. In the second approach, the reagent gas N 2 is pulsed. The absolute percentages of products were monitored versus initial N 2 concentration. Results from this approach also give an upper limit of 5% for NH + N production. This establishes that N 2 + H is the dominant channel, being at least between 95 and 100%, and that there is no significant NH production contrary to a recent storage ring measurement that yielded 64% NH + N and 36% N 2 + H. Possible reasons for this dramatic difference are discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::221dabae1fcc5432cf0da2ddbbf72e5d https://doi.org/10.1021/jp068965d Zobrazit plný text záznamu