Experimental study of NO reaction with isoprene hydroxyalkyl peroxy radicals Academic Article

abstract

• Despite the importance of isoprene hydroxy peroxy radicals (RO 2) in the conversion of NO to NO 2 and hence in tropospheric ozone formation, no direct experimental studies have been carried out to investigate the kinetics of the RO 2-NO reaction. We report the first direct laboratory study of the rate constant for the isoprene RO 2-NO reaction using a fast-flow reactor coupled to chemical ionization mass spectrometry (CIMS) detection. By directly monitoring the peroxy radical, a rate constant of (9 3) 10 -12 cm 3 molecule -1 s -1 was determined in the pressure range of 1 to 2 Torr and at a temperature of 298 2 K. The measured rate constant is compared to the results of a recent theoretical prediction and indirect measurements and implications for the atmosphere are discussed.

authors

• North, Simon
• Zhang, Renyi

published proceedings

• JOURNAL OF PHYSICAL CHEMISTRY A

author list (cited authors)

• Zhang, D., Zhang, R., & North, S. W.

citation count

• 20

complete list of authors

• Zhang, D||Zhang, R||North, SW

publication date

• December 2003

publisher

• American Chemical Society (ACS)  Publisher

published in

• The Journal of Physical Chemistry A: Isolated Molecules, Clusters, Radicals, and Ions; Environmental Chemistry, Geochemistry, and Astrochemistry; Theory  Journal

keywords

• 34 Chemical Sciences
• 3406 Physical Chemistry
• 51 Physical Sciences
• 5102 Atomic, Molecular And Optical Physics

Digital Object Identifier (DOI)

• 10.1021/jp0360016

start page

• 11013

end page

• 11019

volume

• 107

issue

• 50

URL

• http%3A%2F%2Fdx.doi.org%2F10.1021%2Fjp0360016