Night-time tropospheric chemistry of the unsaturated alcohols (Z)-pent-2-en-1-ol and pent-1-en-3-ol: Kinetic studies of reactions of NO3 and N2O5 with stress-induced plant emissions |
| |
| Institution: | 1. Department of Physical and Theoretical Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, UK;2. Facultad de Ciencias Químicas de Ciudad Real, Universidad de Castilla–La Mancha, Avda. Camilo José Cela 1013071,Ciudad Real, Spain;1. Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Hospital Universitario Ramón y Cajal, Madrid, Spain;2. Catalan Institute of Oncology, Hospital Germans Trias I Pujol, Badalona, Barcelona, Spain;3. Hospital General Universitario de Alicante, Alicante, Spain;4. Instituto de Investigación Sanitaria-Fundación Jimenez Díaz (IIS-FJD), Hospital Universitario Fundación Jiménez Díaz, Universidad Autónoma de Madrid, Madrid, Spain;5. Catalan Institute of Oncology, Hospitalet, Barcelona, Spain;6. Hospital Clínico Lozano Blesa, Zaragoza, Spain;7. Hospital Regional Carlos Haya, Malaga, Spain;8. Hospital General Universitario Gregorio Marañón, Madrid, Spain;9. Clinical Biostatistics Unit (IRYCIS) and CIBER Epidemiología y Salud Pública (CIBERESP), Hospital Universitario Ramón y Cajal, Madrid, Spain;1. School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, People''s Republic of China;2. Fraunhofer Institute for Nondestructive Testing (IZFP), Dresden D-01109, Germany;3. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, People''s Republic of China;1. Departamento de Química Física, Facultad de Químicas, Universidad de Castilla-La Mancha, Campus Universitario s/n, 13071 Ciudad-Real, Spain;2. Dpto de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Pabellón Argentina Ala 1 C. Universitaria, CP 5000 Córdoba, Argentina;1. INFIQC (CONICET – Facultad de Ciencias Químicas, Universidad Nacional de Córdoba), Dpto. de Fisicoquímica, Ciudad Universitaria, 5000 Córdoba, Argentina;2. Physikalische Chemie, Bergische Universität Wuppertal, Wuppertal, Germany;3. Faculty of Chemistry, “Al. I. Cuza” University, Iasi, Romania;1. Faculty of Information Science and Engineering, Ningbo University, 315211 Ningbo, People’s Republic of China;2. Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, 315201 Ningbo, People’s Republic of China |
| |
| Abstract: | The night-time tropospheric chemistry of two stress-induced volatile organic compounds (VOCs), (Z)-pent-2-en-1-ol and pent-1-en-3-ol, has been studied at room temperature. Rate coefficients for reactions of the nitrate radical (NO3) with these pentenols were measured using the discharge-flow technique. Because of the relatively low volatility of these compounds, we employed off-axis continuous-wave cavity-enhanced absorption spectroscopy for detection of NO3 in order to be able to work in pseudo first-order conditions with the pentenols in large excess over NO3. The rate coefficients were determined to be (1.53±0.23)×10−13 and (1.39±0.19)×10−14 cm3 molecule−1 s−1 for reactions of NO3 with (Z)-pent-2-en-1-ol and pent-1-en-3-ol. An attempt to study the kinetics of these reactions with a relative-rate technique, using N2O5 as source of NO3 resulted in significantly higher apparent rate coefficients. Performing relative-rate experiments in known excesses of NO2 allowed us to determine the rate coefficients for the N2O5 reactions to be (5.0±2.8)×10−19 cm3 molecule−1 s−1 for (Z)-pent-2-en-1-ol, and (9.1±5.8)×10−19 cm3 molecule−1 s−1 for pent-1-en-3-ol. We show that these relatively slow reactions can indeed interfere with rate determinations in conventional relative-rate experiments. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
