The influence of the temperature on electron attachment to some halocontaining molecules

被引：10

作者：

Kopyra, Janina ^{[1
]}

Wnorowska, Jolanta ^{[1
]}

Forys, Mieczyslaw ^{[1
]}

Szamrej, Iwona ^{[1
]}

机构：

[1] Univ Podlasie, Dept Chem, PL-08110 Siedlce, Poland

来源：

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY | 2010年 / 291卷 / 1-2期

关键词：

Thermal electron attachment rate coefficient; Activation energy; Halocontaining hydrocarbons; Pulsed Townsend technique; RATE CONSTANTS; CAPTURE PROCESSES; COEFFICIENTS; COLLISIONS; THRESHOLD; ENERGIES; CHCL3; CCL4;

D O I：

10.1016/j.ijms.2009.12.016

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：

Thermal electron attachment rate coefficients for CH(2)ClCHClCH(2)Cl, CH(2)ClCH(2)Br, CH(2)ClCH(2)CH(2)Br and CF(2)ClCFCl(2) have been measured using the Pulsed Townsend technique over the temperature range T = 298-358 K. The corresponding rate coefficients at 298 K are equal to 1.7(4) x 10(-10), 7.9(15) x 10(-10) 3.4(5) x 10(-10) and 3.1(1) X 10(-8) cm(3) molec.(-1) s(-1), respectively. With rising temperature we have observed an increase of the rate coefficients k(T), which shows an Arrhenius-type behaviour. Activation energies E(a) of 0.16(1)eV (CH(2)ClCHClCH(2)Cl). 0.12(1) eV (CH(2)ClCH(2)Br), 0.20(1) eV (CH(2)ClCH(2)CH(2)Br) and 0.08(1) eV (CF(2)ClCFCl(2)) were determined from the fit to the experimental data points with a function In(k)= In(A) E(a)/k(B)T. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：13 / 16

页数：4

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