Photodissociation of CF2Br2 at 248 nm: a time-resolved absorption study

Vatsa, Rajesh Kumar ; Kumar, Awadhesh ; Naik, Prakash Dattatray ; Rama Rao, Kuchimanchi Venkata Subba ; Mittal, Jai Pal (1995) Photodissociation of CF2Br2 at 248 nm: a time-resolved absorption study Bulletin of the Chemical Society of Japan, 68 (10). pp. 2817-2822. ISSN 0009-2673

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Official URL: http://www.jstage.jst.go.jp/article/bcsj/68/10/68_...

Related URL: http://dx.doi.org/10.1246/bcsj.68.2817

Abstract

Photodissociation of CF2Br2 at 248 nm has been studied in the gas phase using time-resolved optical absorption spectroscopy. A transient absorption spectrum in the range of 200-320 nm with λ max ≈ 260 nm is observed and has been assigned to the primary photodissociation product, the CF2Br radical. The absorption cross section of this radical at 260 nm has been found to be (1.05 ± 0.2) × 10-18 cm2 molecule-1. The rate constant for CF2Br dimerization is evaluated to be (3.0 ± 0.6) × 10-12 cm3 molecule-1 s-1. Laser fluence dependence in the secondary photodissociation of CF2Br radical is discussed.

Item Type:Article
Source:Copyright of this article belongs to Chemical Society of Japan.
ID Code:25851
Deposited On:04 Dec 2010 11:30
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