Single pulse laser induced reactions of hexafluorobenzene/silane mixtures at 1027 and 944 cm/sup -1 1,2/

Journal Article · Wed Jan 14 23:00:00 EST 1987 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100286a013· OSTI ID:7100929

Koga, Y; Serino, R M; Chen, R; Keehn, P M

C/sub 6/F/sub 6//SiH/sub 4/ mixtures were irradiated with a single pulse of a megawatt CO/sub 2/ infrared laser at 1027 and 944 cm/sup -1/, using fluences which ranged from 0.26 to 2.0 J/cm/sup 2/. Neat C/sub 6/F/sub 6/ (7.5 Torr, 1027 cm/sup -1/) underwent decomposition to C/sub 2/F/sub 4/ at a fluence of 0.7 J/cm/sup 2/ with a conversion per flash (CPF) of 4.5%. At 0.3 J/cm/sup 2/ no reaction was observed, setting a fluence threshold for the laser-induced decomposition of C/sub 6/F/sub 6/ between 0.3 and 0.7 J/cm/sup 2/. In the presence of SiH/sub 4/ explosive reactions occurred with conversion of C/sub 2/F/sub 2/ as high as 70%exclamation Different decomposition products were observed depending upon the amount of SiH/sub 2/ present. The observed results are discussed in terms of (a) the low fluence threshold observed for the laser-induced decomposition of C/sub 6/F/sub 6/, (b) the effects that added gases have on the decomposition of C/sub 6/F/sub 6/, (c) the use of C/sub 6/F/sub 6/ as a sensitizer for laser-induced reactions, and (d) the potential for using SiH/sub 4/ for the laser-induced reduction of C-F bonds (C-F + Si-H ..-->.. C-H + Si-F).

• Research Organization: Brandeis Univ., Waltham, MA
• OSTI ID: 7100929
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 91:2; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
AROMATICS
BENZENE
CARBON DIOXIDE LASERS
CHEMICAL REACTIONS
CHEMISTRY
DATA
EXPERIMENTAL DATA
GAS LASERS
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
LASERS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC SILICON COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOCHEMISTRY
PULSE TECHNIQUES
SILANES
SILICON COMPOUNDS