Negative ion formation in potassium-nitromethane collisions

Yuri Fonseca da Silva Nunes; Paulo Manuel Assis Loureiro Limão-vieira

doi:10.1039/c004467a

Negative ion formation in potassium-nitromethane collisions

Yuri Fonseca da Silva Nunes, Paulo Manuel Assis Loureiro Limão-vieira

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

Ion-pair formation in gaseous nitromethane (CH3NO2) induced by electron transfer has been studied by investigating the products of collisions between fast potassium atoms and nitromethane molecules using a crossed molecular-beam technique. The negative ions formed in such collisions were analysed using time-of-flight mass spectroscopy. The six most dominant product anions are NO2-, O-, CH3NO2-, OH-, CH2NO2- and CNO-. By using nitromethane-d(3) (CD3NO2), we found that previous mass 17 amu assignment to O- delayed fragment, is in the present experiment may be unambiguously assigned to OH-. The formation of CH2NO2- may be explained in terms of dissociative electron attachment to highly vibrationally excited molecules.

Original language	Unknown
Pages (from-to)	12513-12519
Journal	Physical Chemistry Chemical Physics
Volume	12
Issue number	39
DOIs	https://doi.org/10.1039/c004467a
Publication status	Published - 1 Jan 2010

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10.1039/c004467a

Cite this

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title = "Negative ion formation in potassium-nitromethane collisions",

abstract = "Ion-pair formation in gaseous nitromethane (CH3NO2) induced by electron transfer has been studied by investigating the products of collisions between fast potassium atoms and nitromethane molecules using a crossed molecular-beam technique. The negative ions formed in such collisions were analysed using time-of-flight mass spectroscopy. The six most dominant product anions are NO2-, O-, CH3NO2-, OH-, CH2NO2- and CNO-. By using nitromethane-d(3) (CD3NO2), we found that previous mass 17 amu assignment to O- delayed fragment, is in the present experiment may be unambiguously assigned to OH-. The formation of CH2NO2- may be explained in terms of dissociative electron attachment to highly vibrationally excited molecules.",

keywords = "ch3no2, derivatives, spectroscopy, dissociative, bound, impact, anions, dipole, electron-attachment, states, orbitals, atoms",

author = "Nunes, {Yuri Fonseca da Silva} and Lim{\~a}o-vieira, {Paulo Manuel Assis Loureiro}",

year = "2010",

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doi = "10.1039/c004467a",

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journal = "Physical Chemistry Chemical Physics",

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T1 - Negative ion formation in potassium-nitromethane collisions

AU - Nunes, Yuri Fonseca da Silva

AU - Limão-vieira, Paulo Manuel Assis Loureiro

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N2 - Ion-pair formation in gaseous nitromethane (CH3NO2) induced by electron transfer has been studied by investigating the products of collisions between fast potassium atoms and nitromethane molecules using a crossed molecular-beam technique. The negative ions formed in such collisions were analysed using time-of-flight mass spectroscopy. The six most dominant product anions are NO2-, O-, CH3NO2-, OH-, CH2NO2- and CNO-. By using nitromethane-d(3) (CD3NO2), we found that previous mass 17 amu assignment to O- delayed fragment, is in the present experiment may be unambiguously assigned to OH-. The formation of CH2NO2- may be explained in terms of dissociative electron attachment to highly vibrationally excited molecules.

AB - Ion-pair formation in gaseous nitromethane (CH3NO2) induced by electron transfer has been studied by investigating the products of collisions between fast potassium atoms and nitromethane molecules using a crossed molecular-beam technique. The negative ions formed in such collisions were analysed using time-of-flight mass spectroscopy. The six most dominant product anions are NO2-, O-, CH3NO2-, OH-, CH2NO2- and CNO-. By using nitromethane-d(3) (CD3NO2), we found that previous mass 17 amu assignment to O- delayed fragment, is in the present experiment may be unambiguously assigned to OH-. The formation of CH2NO2- may be explained in terms of dissociative electron attachment to highly vibrationally excited molecules.

KW - ch3no2

KW - derivatives

KW - spectroscopy

KW - dissociative

KW - bound

KW - impact

KW - anions

KW - dipole

KW - electron-attachment

KW - states

KW - orbitals

KW - atoms

U2 - 10.1039/c004467a

DO - 10.1039/c004467a

M3 - Article

C2 - 20721400

VL - 12

SP - 12513

EP - 12519

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

SN - 1463-9076

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