Reaction kinetics of nitrate radicals with terpenes in solution studied by cavity ring-down spectroscopy

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The use of cavity ring-down spectroscopy for kinetic measurements of photo-induced reactions in solution has been demonstrated for the first time. Second-order rate coefficients for reaction of NO3 with terpenes in acetonitrile were determined: (2.93 +/- 0.48) x 10(9) M-1 s(-1) (alpha-pinene), (2.86 +/- 0.35) x 10(9) M-1 s(-1) (beta-pinene), and (1.40 +/- 0.12) x 10(9) M-1 s(-1) (limonene). The rate coefficients were found to be lower than previous measurements in the gas-phase, which we attribute to the onset of a diffusion-controlled limit to the reaction rate in solution. (C) 2004 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)138-142
Number of pages5
JournalChemical Physics Letters
Issue number1-3
Publication statusPublished - 21 Jul 2004

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