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Titolo:
Kinetics of the reactions of pinonaldehyde with OH radicals and with Cl atoms
Autore:
Noziere, B; Spittler, M; Ruppert, L; Barnes, I; Becker, KH; Pons, M; Wirtz, K;
Indirizzi:
Natl Ctr Atmospher Res, Boulder, CO 80307 USA Natl Ctr Atmospher Res Boulder CO USA 80307 er Res, Boulder, CO 80307 USA Berg Univ Gesamthsch Wuppertal, D-42097 Wuppertal, Germany Berg Univ Gesamthsch Wuppertal Wuppertal Germany D-42097 pertal, Germany Parque,Tecnol, Fdn Ctr Estudios Ambiantales Mediterraneo, ES-46980 Valencia Parque Tecnol Valencia Spain ES-46980 es Mediterraneo, ES-46980 Valencia
Titolo Testata:
INTERNATIONAL JOURNAL OF CHEMICAL KINETICS
fascicolo: 4, volume: 31, anno: 1999,
pagine: 291 - 301
SICI:
0538-8066(199904)31:4<291:KOTROP>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
GAS-PHASE REACTIONS; ALPHA-PINENE; ORGANIC-COMPOUNDS; RATE CONSTANTS; NO3 RADICALS; BETA-PINENE; PRODUCT; ALKENES; TERPENES; SERIES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Noziere, B Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA Natl Ctr Atmospher Res POB 3000 Boulder CO USA 80307 80307 USA
Citazione:
B. Noziere et al., "Kinetics of the reactions of pinonaldehyde with OH radicals and with Cl atoms", INT J CH K, 31(4), 1999, pp. 291-301

Abstract

The rate constant for the reaction of OH radicals with pinonaldehyde has been measured at 293 +/- 6 K using the relative rate method in the laboratory in Wuppertal (Germany) using photolytic sources for the production of OH radicals and in the EUPHORE smog chamber facility in Valencia (Spain) usingthe in situ ozonolysis of 2,3-dimethyl-2-butene as a dark source of OH radicals. In ail the experiments pinonaldehyde and the reference compounds were monitored by FTIR spectroscopy, and in addition in the EUPHORE smog chamber the decay of pinonaldehyde was monitored by the HPLC/DNPH method and thereference compound by GC/FID. The results from all the different series ofexperiments were in good agreement and lead to an average value of k(pinonaldehyde + OH) = (4.0 +/- 1.0) x 10(-11) cm(3) molecule(-1) s(-1). This result lead to steady-state estimates of atmospheric pinonaldehyde concentrations in the ppbV range (1 ppbV approximate to 2.5 X 10(10) molecule cm(-3) at 298 K and 1 atm) in regions with substantial Lu-pinene emission. It also implies that atmospheric sinks of pinonaldehyde by reaction with OH radicals could be half as important as its photolysis, The rate constant of the reaction of pinonaldehyde with Ci atoms has been measured for the first time. Relative rate measurements lead to a value of k(pinonaldehyde + Cl) = (2.4+/- 1.4) x 10(-10) cm(3) molecule(-1) s(-1). In contrast to previous studies which suggested enhanced kinetic reactivity for pinonaldehyde compared to other aldehydes, the results from both the OH- and CI-initiated oxidationof pinonaldehyde in the present work are in line with predictions using structure-activity relationships. (C) 1999 John Wiley C Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/18 alle ore 08:05:32