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Identification of Negative Ion at m/z 20 Produced by Atmospheric Pressure Corona Discharge Ionization under Ambient Air

The negative ion at m/z 20 observed at atmospheric pressure corona discharge ionization mass spectra has been identified by supplying the vapors of deuterium oxide (D(2)O) and H(2)(18)O. From the mass shifts of the ion at m/z 20 observed with D(2)O and H(2)(18)O, it was suggested that the chemical c...

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Autores principales: Fujishima, Shiho, Sekimoto, Kanako, Takayama, Mitsuo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Mass Spectrometry Society of Japan 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10288065/
https://www.ncbi.nlm.nih.gov/pubmed/37360413
http://dx.doi.org/10.5702/massspectrometry.A0124
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author Fujishima, Shiho
Sekimoto, Kanako
Takayama, Mitsuo
author_facet Fujishima, Shiho
Sekimoto, Kanako
Takayama, Mitsuo
author_sort Fujishima, Shiho
collection PubMed
description The negative ion at m/z 20 observed at atmospheric pressure corona discharge ionization mass spectra has been identified by supplying the vapors of deuterium oxide (D(2)O) and H(2)(18)O. From the mass shifts of the ion at m/z 20 observed with D(2)O and H(2)(18)O, it was suggested that the chemical composition of the ion at m/z 20 is to be H(4)O. Further mass shift from m/z 20 to 22 was observed by supplying the vapor of perfluorokerocene, suggesting the chemical composition of H(3)F. The chemical compositions of the negative ions H(4)O(−) and H(3)F(−) were consistence with the dipole-bound complex states between hydrogen H(2) and polar molecules such as H(2)O and hydrogen fluoride (HF) having dipole moments beyond a critical dipole moment of 1.625 D, theoretically proposed by Skurski and Simons. The ionic chemical compositions and structures of H(4)O(−) and H(3)F(−) obtained with density functional theory calculations implied that both dipole-bound complex H(2)O(−)…H(2) and HF(−)…H(2) can be formed by exothermic reactions by which H(2) molecule is complexing with negative ions H(2)O(−) and HF(−), respectively.
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spelling pubmed-102880652023-06-24 Identification of Negative Ion at m/z 20 Produced by Atmospheric Pressure Corona Discharge Ionization under Ambient Air Fujishima, Shiho Sekimoto, Kanako Takayama, Mitsuo Mass Spectrom (Tokyo) Original Article The negative ion at m/z 20 observed at atmospheric pressure corona discharge ionization mass spectra has been identified by supplying the vapors of deuterium oxide (D(2)O) and H(2)(18)O. From the mass shifts of the ion at m/z 20 observed with D(2)O and H(2)(18)O, it was suggested that the chemical composition of the ion at m/z 20 is to be H(4)O. Further mass shift from m/z 20 to 22 was observed by supplying the vapor of perfluorokerocene, suggesting the chemical composition of H(3)F. The chemical compositions of the negative ions H(4)O(−) and H(3)F(−) were consistence with the dipole-bound complex states between hydrogen H(2) and polar molecules such as H(2)O and hydrogen fluoride (HF) having dipole moments beyond a critical dipole moment of 1.625 D, theoretically proposed by Skurski and Simons. The ionic chemical compositions and structures of H(4)O(−) and H(3)F(−) obtained with density functional theory calculations implied that both dipole-bound complex H(2)O(−)…H(2) and HF(−)…H(2) can be formed by exothermic reactions by which H(2) molecule is complexing with negative ions H(2)O(−) and HF(−), respectively. The Mass Spectrometry Society of Japan 2023 2023-06-21 /pmc/articles/PMC10288065/ /pubmed/37360413 http://dx.doi.org/10.5702/massspectrometry.A0124 Text en Copyright @ 2023 Shiho Fujishima, Kanako Sekimoto, and Mitsuo Takayama. https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of Creative Commons Attribution Non-Commercial 4.0 International License, which permits use, distribution, and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Original Article
Fujishima, Shiho
Sekimoto, Kanako
Takayama, Mitsuo
Identification of Negative Ion at m/z 20 Produced by Atmospheric Pressure Corona Discharge Ionization under Ambient Air
title Identification of Negative Ion at m/z 20 Produced by Atmospheric Pressure Corona Discharge Ionization under Ambient Air
title_full Identification of Negative Ion at m/z 20 Produced by Atmospheric Pressure Corona Discharge Ionization under Ambient Air
title_fullStr Identification of Negative Ion at m/z 20 Produced by Atmospheric Pressure Corona Discharge Ionization under Ambient Air
title_full_unstemmed Identification of Negative Ion at m/z 20 Produced by Atmospheric Pressure Corona Discharge Ionization under Ambient Air
title_short Identification of Negative Ion at m/z 20 Produced by Atmospheric Pressure Corona Discharge Ionization under Ambient Air
title_sort identification of negative ion at m/z 20 produced by atmospheric pressure corona discharge ionization under ambient air
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10288065/
https://www.ncbi.nlm.nih.gov/pubmed/37360413
http://dx.doi.org/10.5702/massspectrometry.A0124
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