Molecular beam studies of the photodissociation of benzene at 193 and 248 nm

Journal Article · Sun Apr 01 00:00:00 EST 1990 · Journal of Chemical Physics; (USA)

DOI:https://doi.org/10.1063/1.457780· OSTI ID:7140659

Yokoyama, A; Zhao, X; Hintsa, E J; Continetti, R E; Lee, Y T ^[1]

---

1. Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, Berkeley, CA (USA) Department of Chemistry, University of California, Berkeley, California 94720 (USA)

The photodissociation processes of benzene following excitation at 193 and 248 nm have been studied by molecular beam photofragmentation translational spectroscopy. When benzene was excited to the {sup 1}{ital B}{sub 1{ital u}} state by absorption at 193 nm, dissociation occurred through three primary channels, C{sub 6}H{sub 5}+H (80%), C{sub 6}H{sub 4}+H{sub 2} (16%), and C{sub 5}H{sub 3}+CH{sub 3} (4%), following internal conversion to the vibrationally excited ground state. When benzene was excited to the {sup 1}{ital B}{sub 2{ital u}} state at 248 nm, two primary dissociation channels, C{sub 6}H{sub 4}+H{sub 2} (96%), and C{sub 5}H{sub 3}+CH{sub 3} (4%), were observed. Photodissociation to produce two C{sub 3}H{sub 3} was induced by two photon absorption of benzene at both 193 and 248 nm. Numerous secondary photodissociation processes of the primary photoproducts were also observed at both 193 and 248 nm.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 7140659
• Journal Information: Journal of Chemical Physics; (USA), Vol. 92:7; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BENZENE
PHOTOLYSIS
DISSOCIATION
FAR ULTRAVIOLET RADIATION
INTERNAL CONVERSION
MOLECULAR BEAMS
MULTI-PHOTON PROCESSES
QUANTUM EFFICIENCY
AROMATICS
BEAMS
CHEMICAL REACTIONS
CONVERSION
DECAY
DECOMPOSITION
EFFICIENCY
ELECTROMAGNETIC RADIATION
HYDROCARBONS
NUCLEAR DECAY
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
RADIATIONS
ULTRAVIOLET RADIATION
400500* - Photochemistry