Dissociative electron attachment in chlorofluoromethanes and the correlation with vertical attachment energies

被引:46
作者
Aflatooni, K [1 ]
Burrow, PD [1 ]
机构
[1] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA
基金
美国国家科学基金会;
关键词
dissociative electron attachment; vertical attachment energies; temporary anion states; chlorofluoromethane; LUMO;
D O I
10.1016/S1387-3806(00)00320-1
中图分类号
O64 [物理化学(理论化学)、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号
070203 ; 070304 ; 081704 ; 1406 ;
摘要
The total dissociative electron attachment (DEA) cross sections of the chlorofluoromethanes are determined in an electron beam experiment and correlated with the vertical attachment energies (VAEs) for formation of the lowest temporary anion states of these compounds. The latter are determined independently by electron transmission spectroscopy and correspond to the energies of the anions at the equilibrium geometries of the neutral molecules. As we observed previously in the chloroalkanes, the peak DEA cross sections are well correlated with VAEs. For values of VAEs between 0.9 to 3.0 eV, the peak DEA cross sections vary by more than four orders of magnitude. This is attributable in part to the remarkably monotonic variation of the temporary anion widths, arising from their finite lifetimes, over this range of VAE. (C) 2001 Elsevier Science B.V.
引用
收藏
页码:149 / 161
页数:13
相关论文
共 30 条
[1]   Temporary anion states of dichloroalkanes and selected polychloroalkanes [J].
Aflatooni, K ;
Gallup, GA ;
Burrow, PD .
JOURNAL OF PHYSICAL CHEMISTRY A, 2000, 104 (31) :7359-7369
[2]   Dissociative electron attachment in chloroalkanes and the correlation with vertical attachment energies [J].
Aflatooni, K ;
Gallup, GA ;
Burrow, PD .
CHEMICAL PHYSICS LETTERS, 1998, 282 (5-6) :398-402
[3]   Total cross sections for dissociative electron attachment in dichloroalkanes and selected polychloroalkanes: The correlation with vertical attachment energies [J].
Aflatooni, K ;
Burrow, PD .
JOURNAL OF CHEMICAL PHYSICS, 2000, 113 (04) :1455-1464
[4]   Low energy (0-14 eV) electron impact to CHF2Cl at different phase conditions:: medium enhanced desorption of anions [J].
Brüning, F ;
Tegeder, P ;
Langer, J ;
Illenberger, E .
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 2000, 195 :507-516
[5]   TEMPORARY NEGATIVE-IONS IN THE CHLOROMETHANES CHCL2F AND CCL2F2 - CHARACTERIZATION OF THE SIGMA-STAR ORBITALS [J].
BURROW, PD ;
MODELLI, A ;
CHIU, NS ;
JORDAN, KD .
JOURNAL OF CHEMICAL PHYSICS, 1982, 77 (05) :2699-2701
[6]   Electron interactions with CCl2F2 [J].
Christophorou, LG ;
Olthoff, JK ;
Wang, YC .
JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA, 1997, 26 (05) :1205-1237
[7]   DISSOCIATIVE ATTACHMENT OF ELECTRONS IN THE CHLOROMETHANES [J].
CHU, SC ;
BURROW, PD .
CHEMICAL PHYSICS LETTERS, 1990, 172 (01) :17-22
[8]   SEMIEMPIRICAL CALCULATIONS OF INELASTIC ELECTRON-METHYLCHLORIDE SCATTERING [J].
FABRIKANT, II .
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1994, 27 (18) :4325-4336
[9]  
FABRIKANT II, 1999, COMMUNICATION
[10]   TEMPERATURE EFFECTS OF DISSOCIATIVE ELECTRON-ATTACHMENT TO CF3CL [J].
HAHNDORF, I ;
ILLENBERGER, E ;
LEHR, L ;
MANZ, J .
CHEMICAL PHYSICS LETTERS, 1994, 231 (4-6) :460-466