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Absorption cross-section measurements of ortho-xylyl radical in the 460.1–475.1 nm region and investigation of its temperature and pressure dependence using cavity ringdown spectroscopy
, Bej P.K.
Published in Elsevier BV
Volume: 765
Pages: 138 - 314
The gas phase absorption cross-sections of o-xylyl radical were measured in the wavelength range of 460.1–475.1 nm with 0.2 nm resolution at 298 K and 40 Torr using pulsed laser photolysis-cavity ringdown spectroscopy (PLP-CRDS) and was found to be maximum at 468.3 nm [σo-xylyl468.3nm=(1.58 ± 0.38) × 10−18 cm2 molecule−1]. The temperature dependency of the cross-section was: σo-xylyl468.3nmT263-338K=[(6.39 ± 0.64) × 10−21] + [(2.60 ± 0.27) × 10−15 exp(−0.026 T/K)] cm2 molecule−1. A negligible pressure dependency was observed in the studied range of 40–95 Torr. The Time Dependent Density Functional Theory (TD-DFT) calculations were also performed to compute the visible absorption spectrum of o-xylyl radical. © 2020 Elsevier B.V.
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JournalData powered by TypesetChemical Physics Letters
PublisherData powered by TypesetElsevier BV
Open AccessNo