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Title Discharge flow-photoionization mass spectrometric study of HOI: Photoionization efficiency spectrum and ionization energy
Creator/Author Monks, P.S. ; Stief, L.J. [NASA/Goddard Space Flight Center, Greenbelt, MD (United States)] ; Tardy, D.C. [Univ. of Iowa, Iowa City, IA (United States)] ; Liebman, J.F. [Univ. of Maryland, Baltimore, MD (United States)] ; Zhang, Z. ; Kuo, S.C. ; Klemm, R. B. [Brookhaven National Lab., Upton, NY (United States)]
Publication Date1995 Nov 09
OSTI IdentifierOSTI ID: 174268
Other Number(s)JPCHAX; ISSN 0022-3654
Resource TypeJournal Article
Resource RelationJournal of Physical Chemistry ; VOL. 99 ; ISSUE: 45 ; PBD: 9 Nov 1995
Subject40 CHEMISTRY ; PHOTOCHEMICAL REACTIONS; EFFICIENCY; HYPOIODOUS ACID; PHOTOIONIZATION; IONIZATION POTENTIAL; MASS SPECTRA; IODINE COMPOUNDS
Description/Abstract Photoionization efficiency (PIE) spectra of HOI were measured over the wavelength range{lambda}= 115-130 nm and in the ionization threshold region,{lambda}= 123-129 nm, using a discharge flow-photoionization mass spectrometer apparatus coupled to a synchrotron radiation source. HOI was generated, in situ but in varying amounts, by three separate reactions: OH+ I{sub 2}; OH+ CF{sub 3}I; O({sup 3}P)+ C{sub 2}H{sub 5}I. The PIE spectra displayed steplike behavior near threshold, and the HO-I stretching frequency in the cation was determined to be 702{+-} 60 cm{sup -1}. Even though the present result appears to be the first reported determination of IE(HOI), the experimental value is compared to an estimated value previously derived via a trend analysis and it is considered in terms of trends in the series IE(HOX), where X= F, Cl, Br, and I. Based on the value for IE(HOI) derived in the present study, a value for IE(IO)= 9.66{+-} 0.10 eV has been predicted. 37 refs., 4 figs., 3 tabs.
Country of PublicationUnited States
LanguageEnglish
Formatpp. 16566-16570 ; PL:
System Entry Date2001 May 03

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