Photodissociation dynamics of cumene hydroperoxide at 248 and 193 nm

Citation
Sk. Shin et al., Photodissociation dynamics of cumene hydroperoxide at 248 and 193 nm, J PHYS CH A, 105(44), 2001, pp. 10018-10024
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF PHYSICAL CHEMISTRY A
ISSN journal
1089-5639 → ACNP
Volume
105
Issue
44
Year of publication
2001
Pages
10018 - 10024
Database
ISI
SICI code
1089-5639(20011108)105:44<10018:PDOCHA>2.0.ZU;2-Y
Abstract
Photodissociation dynamics of cumene hydroperoxide at 248 and 193 nm produc ing (C6H5)(CH3)(2)CO (CumO) and OH fragments has been investigated by measu ring laser induced fluorescence spectra of the OH fragments, which are prod uced exclusively in the ground electronic state. The measured energy distri butions among the fragments are f(r)(OH) = 0.03, f(t) = 0.49, f(int)(CumO) = 0.48 and f(r)(OH) = 0.03, f(t) = 0. 18, f(int)(CumO) = 0.79 at 248 and 19 3 nm, respectively, and negligible vibrational excitation in OH was observe d at both wavelengths. At 248 nm, slightly negative mu -v and positive v-J vector correlations were observed by analyzing the Doppler profiles of the rotationally resolved OH spectra, whereas no vector correlations were obser ved at 193 nm. From the measurements, detailed photodissociation dynamics o f cumene hydroperoxide is discussed compared to the case of tert-butyl hydr operoxide previously studied.