Corona Discharge and Field Electron Emission in Ambient Air Using a Sharp Metal Needle: Formation and Reactivity of CO 3 -• and O 2 -
CO and O are known to be strong oxidizing reagents in biological systems. CO in particular can cause serious damage to DNA and proteins by H abstraction reactions. However, H abstraction of CO in the gas phase has not yet been reported. In this work we report on gas-phase ion/molecule reactions of C...
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Published in | Mass spectrometry (Tokyo, Japan) Vol. 10; no. 1; p. A0100 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Japan
2021
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Subjects | |
Online Access | Get full text |
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Summary: | CO
and O
are known to be strong oxidizing reagents in biological systems. CO
in particular can cause serious damage to DNA and proteins by H
abstraction reactions. However, H
abstraction of CO
in the gas phase has not yet been reported. In this work we report on gas-phase ion/molecule reactions of CO
and O
with various molecules. CO
was generated by the corona discharge of an O
reagent gas using a cylindrical tube ion source. O
was generated by the application of a 15 kHz high frequency voltage to a sharp needle in ambient air at the threshold voltage for the appearance of an ion signal. In the reactions of CO
, a decrease in signal intensities of CO
accompanied by the simultaneous increase of that of HCO
was observed when organic compounds with H-C bond energies lower than ∼100 kcal mol
such as
-hexane, cyclohexane, methanol, ethanol, 1-propanol, 2-propanol, and toluene were introduced into the ion source. This clearly indicates the occurrence of H
abstraction. O
abstracts H
from acid molecules such as formic, acetic, trifluoroacetic, nitric and amino acids. Gas-phase CO
may play a role as a strong oxidizing reagent as it does in the condensed phase. The major discharge product CO
in addition to O
, O
, and NO
that are formed in ambient air may cause damage to biological systems. |
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ISSN: | 2187-137X |