Abstract
Pulse radiolysis transient UV-visible absorption spectroscopy was used to study the UV-visible absorption spectrum (225-575 nm) of the phenyl radical, C6H5(.), and kinetics of its reaction with NO. Phenyl radicals have a strong broad featureless absorption in the region of 225-340 nm. In the presence of NO phenyl radicals are converted into nitrosobenzene. The phenyl radical spectrum was measured relative to that of nitrosobenzene. Based upon sigma(C6H5NO)(270nm) = 3.82 x 10(-17) cm(2) molecule(-1) we derive an absorption cross-section for phenyl radicals at 250 nm, sigma(C6H5(.))(250nm) = (2.75 +/- 0.58) x 10(-17) cm(2) molecule(-1). At 295 K in 200-1000 mbar of Ar diluent k(C6H5(.) + NO) = (2.09 +/- 0.15) x 10(-11) cm(3) molecule(-1) s(-1). (C) 1998 Elsevier Science B.V. All rights reserved.
Original language | English |
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Journal | Chemical Physics Letters |
Volume | 290 |
Issue number | 4-6 |
Pages (from-to) | 363-370 |
ISSN | 0009-2614 |
DOIs | |
Publication status | Published - 1998 |