A discharge flow-photoionization mass spectrometric study of hydroxymethyl radicals (H{sub 2}COH and H{sub 2}COD): Photoionization spectrum and ionization energy

Journal Article · Thu Jan 09 04:00:00 EST 1992 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100180a023· OSTI ID:563379

Tao, W; Klemm, R B ^[1]; Nesbitt, F L; Stief, L J ^[2]

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1. Brookhaven National Lab., Upton, NY (United States)
2. NASA/Goddard Space Flight Center, Greenbelt, MD (United States)

The photoionization spectrum of H{sub 2}COH was measured over the wavelength range 140-170 nm by using a discharge flow-photoionization mass spectrometer apparatus with synchrotron radiation. Hydroxymethyl radicals (H{sub 2}COH and H{sub 2}COD) were generated in a flow tube by the reaction of F atoms with CH{sub 3}OH(D). Ionization energies (IE) were determined directly from photoion thresholds. The IE values, 7.56 {plus_minus} 0.02 and 7.55 {plus_minus} 0.02 eV for H{sub 2}COH and H{sub 2}COD, respectively, are consistent with previous measurements. Also, the dissociative ionization process, presumed to be H{sub 3}CO* {yields} HCO{sup +} + H{sub 2}, was observed with a threshold at 8.61 {plus_minus} 0.06 eV. 44 refs., 5 figs.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 563379
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 1 Vol. 96; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
54 ENVIRONMENTAL SCIENCES
COMBUSTION PRODUCTS
HYDROCARBONS
HYDROXY COMPOUNDS
METHYL RADICALS
PHOTOIONIZATION