Issue 24, 2003

Absolute rate coefficients of the reactions of CF23B1) with NO and H2 between 287 K and 600 K

Abstract

The rate coefficients of the elementary reactions of metastable electronically excited CF23B1) with NO and H2 have been determined for the first time over an extended temperature range (287 K–600 K). CF2(3B1) radicals were generated by pulsed laser photolysis of C2F4 at 193 nm and real-time pseudo-first-order decays of the relative CF2(3B1) concentration were obtained by monitoring the CF2(3B1 → 1A1) emission at 570–700 nm. Over the experimental temperature range, the rate coefficient of CF23B1) + NO exhibits a marked negative temperature dependence: kNO(T) = (9.7 ± 2.5) × 10−12 exp[+(545 ± 80)K/T] cm3 s−1 molecule−1. For the removal of CF23B1) by H2, only an upper limit of kH2 ≤ 3 × 10−14 cm3 s−1 molecule−1 could be established over this temperature range.

Article information

Article type
Paper
Submitted
24 Sep 2003
Accepted
29 Oct 2003
First published
14 Nov 2003

Phys. Chem. Chem. Phys., 2003,5, 5405-5408

Absolute rate coefficients of the reactions of CF23B1) with NO and H2 between 287 K and 600 K

B. Dils, R. M. I. Elsamra, J. Peeters and S. A. Carl, Phys. Chem. Chem. Phys., 2003, 5, 5405 DOI: 10.1039/B311847A

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