Ion chemistry in trifluoromethane, CHF3

被引：29

作者：

Jiao, CQ ^{[1
]}

Nagpal, R ^{[1
]}

Haaland, PD ^{[1
]}

机构：

[1] USAF,WRIGHT LAB,WRIGHT PATTERSON AFB,OH 45433

来源：

CHEMICAL PHYSICS LETTERS | 1997年 / 269卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(97)00253-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cross sections for dissociative ionization of trifluoromethane by electron impact have been measured using Fourier-transform mass spectrometry. Four fragment ions, CHF2+, CF3+, CF2+, and CF+ are observed, with a total cross section of 3.4 +/- 0.4 x 10(-16) cm(2) at 60 eV. CFx+ (x = 1 - 3) ions react with neutral CHF3 to yield CHF2+ with rate coefficients of 3.9 +/- 0.5 and 2.1 +/- 0.4 x 10(-10) cm(3)s(-1) for x = 2 and 3, respectively. The rate of cationic polymerization is less than 7 x 10(-13) cm(3)s(-1) and the anions F- and CF3- have yields less than 3 x 10(-20) cm(2) between 30 and 60 eV. (C) 1997 Published by Elsevier Science B.V.

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页码：117 / 121

页数：5

相关论文

共 34 条

[1] MOLECULAR ELECTRON IONIZATION CROSS SECTIONS AT 70-EV [J].

BERAN, JA ;

KEVAN, L .

JOURNAL OF PHYSICAL CHEMISTRY, 1969, 73 (11) :3866-&

[2] ELECTRON ATTACHMENT TO HALOGENATED ALIPHATIC HYDROCARBONS [J].

BLAUNSTE.RP ;

CHRISTOP.LG .

JOURNAL OF CHEMICAL PHYSICS, 1968, 49 (04) :1526-&

[3] GAS-PHASE ION CHEMISTRY OF FLUOROMETHANES BY ION-CYCLOTRON RESONANCE SPECTROSCOPY - NEW TECHNIQUES FOR DETERMINATION OF CARBONIUM-ION STABILITIES [J].

BLINT, RJ ;

MCMAHON, TB ;

BEAUCHAM.JL .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1974, 96 (05) :1269-1278

[4] MECHANISM OF THERMAL-ENERGY CHARGE-TRANSFER REACTIONS - HE+.,NE+.,AR+.,KR+.,XE+.,N2+.,CO+.,CO2+., AND N2O+. REACTING WITH CH3F, CH2F2, CHF3 AND CF4 [J].

CHAU, M ;

BOWERS, MT .

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES, 1977, 24 (02) :191-197

[5] THERMAL ENERGY ELECTRON ATTACHMENT RATE CONSTANTS FOR SOME POLYATOMIC-MOLECULES [J].

DAVIS, FJ ;

COMPTON, RN ;

NELSON, DR .

JOURNAL OF CHEMICAL PHYSICS, 1973, 59 (05) :2324-2329

[6]

*EPA NIH, 1987, NSRDSNBS63 EPA NIH

[7] DIRECT OBSERVATION OF ELECTRON DISAPPEARANCE IN PULSE IRRADIATED FLUOROCARBON GASES [J].

FESSENDEN, RW ;

BANSAL, KM .

JOURNAL OF CHEMICAL PHYSICS, 1970, 53 (09) :3468-+

[8] CROSS-SECTION MEASUREMENTS FOR ELECTRON-IMPACT DISSOCIATION OF CHF3 INTO NEUTRAL AND IONIC RADICALS [J].

GOTO, M ;

NAKAMURA, K ;

TOYODA, H ;

SUGAI, H .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1994, 33 (6A) :3602-3607

[9] GENERAL PHASE MODULATION METHOD FOR STORED WAVEFORM INVERSE FOURIER-TRANSFORM EXCITATION FOR FOURIER-TRANSFORM ION-CYCLOTRON RESONANCE MASS-SPECTROMETRY [J].

GUAN, SH .

JOURNAL OF CHEMICAL PHYSICS, 1989, 91 (02) :775-777

[10] DISSOCIATIVE IONIZATION OF SILANE [J].

HAALAND, P .

CHEMICAL PHYSICS LETTERS, 1990, 170 (2-3) :146-152

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