UV-visible spectra and gas-phase rate coefficients for the reaction of 2,3-pentanedione and 2,4-pentanedione with OH radicals

被引：24
|
作者：
Messaadia, L. [1 ,2 ]
El Dib, G. [3 ]
Ferhati, A. [2 ]
Chakir, A. [4 ]
机构：
[1] Univ Mohamed Seddik Ben Yahia, Dept Chim, Fac Sci Exactes & Informat, Ouled Aissa 18000, Jijle, Algeria
[2] Univ Batna, Fac Sci, Lab LCCE, Batna 05000, Algeria
[3] Univ Rennes 1, UMR CNRS 6251, Inst Phys Rennes, F-35042 Rennes, France
[4] Univ Reims, UFR Sci, GSMA UMR CNRS 7331, F-51687 Reims 02, France
来源：
CHEMICAL PHYSICS LETTERS | 2015年 / 626卷
关键词：
ABSORPTION CROSS-SECTIONS; ATMOSPHERIC CHEMISTRY; PHOTOCHEMICAL DATA; ALIPHATIC-KETONES; PHOTOLYSIS; FLUORESCENCE; KINETICS; SERIES; CHLORINE; HYDROXYL;
D O I：
10.1016/j.cplett.2015.02.032
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：
The UV absorption cross-sections of 2,3-pentanedione and 2,4-pentanedione were measured and their reactions with OH were investigated in the gas-phase using a relative rate method. A temperature dependence of the rate coefficients was observed for both reactions over the temperature range 298-338 K. This work provides the first UV cross-section in the gas phase for 2,4-pentanedione and the first kinetic data for the reaction of 2,3-pentanedione with OH radicals as a function of temperature. The tropospheric lifetimes obtained in this work suggest that once emitted into the atmosphere, these species could be quickly degraded close to their emission sources. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：73 / 79
页数：7
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