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Photodissociation dynamics of 3-bromo-1,1,1-trifluoro-2-propanol and 2-(bromomethyl) hexafluoro-2-propanol at 234 nm: Resonance-enhanced multiphoton ionization detection of Br (2 P j )
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10.1063/1.3591373
/content/aip/journal/jcp/134/19/10.1063/1.3591373
http://aip.metastore.ingenta.com/content/aip/journal/jcp/134/19/10.1063/1.3591373

Figures

Image of FIG. 1.
FIG. 1.

2 + 1 REMPI spectra of Br atom produced in the photo dissociation of Bromoform (CHBr3) at 234 nm. The peaks marked are scanned for the measurement of Br*/Br ratio, the intense being that of Br*.

Image of FIG. 2.
FIG. 2.

REMPI-TOF profiles of Br(2 P 3/2) produced from the 234 nm photodissociation of BTFP. The circles are the experimental data and the solid line is a forward convolution fit. Three panels, namely, upper, middle, and lower panels correspond to experimental geometries with χ = 0°, χ = 54.7°, and χ = 90°, respectively.

Image of FIG. 3.
FIG. 3.

REMPI-TOF profiles of Br*(2 P 1/2) produced from the 234 nm photodissociation of BTFP. The circles are the experimental data and the solid line is a forward convolution fit. Three panels, namely, upper, middle, and lower panels correspond to experimental geometries with χ = 0°, χ = 54.7°, χ = 90°, respectively.

Image of FIG. 4.
FIG. 4.

REMPI-TOF profiles of Br(2 P 3/2) produced from the 234 nm photodissociation of BMHFP. The circles are the experimental data and the solid line is a forward convolution fit. Three panels, namely, upper, middle, and lower panels correspond to experimental geometries with χ = 0°, χ = 54.7°, χ = 90°, respectively.

Image of FIG. 5.
FIG. 5.

REMPI-TOF profiles of Br*(2 P 1/2) produced from the 234 nm photodissociation of BMHFP. The circles are the experimental data and the solid line is a forward convolution fit. Three panels, namely, upper, middle, and lower panels correspond to experimental geometries with χ = 0°, χ = 54.7°, χ = 90°, respectively.

Image of FIG. 6.
FIG. 6.

Photofragment translational energy distribution of Bromine atoms determined for the 234 nm dissociation of BTFP. The solid line indicates the translational energy distributions for the Br(2 P 3/2) and the dotted line for Br*(2 P 1/2) atom.

Image of FIG. 7.
FIG. 7.

Photofragment translational energy distribution of Bromine atoms determined for the 234 nm dissociation of BMHFP. The solid line indicates the translational energy distributions for the Br(2 P 3/2) and the dotted line for Br*(2 P 1/2) atom.

Image of FIG. 8.
FIG. 8.

Profiles of Br and Br* atoms produced in the 234 nm laser photolysis of BTFP used for the determination of their ratio.

Image of FIG. 9.
FIG. 9.

Profiles of Br and Br* atoms produced in the 234 nm laser photolysis of BMHFP used for the determination of their ratio.

Tables

Generic image for table
Table I.

The excitation energy (), dissociation energy of the C–Br bond (D 0), available energy (E avl), the average translational energy, f T value, the relative quantum yield (Φ) and the recoil anisotropy parameter (β) for photodissociation of BTFP and BMHFP at 234 nm leading to Br and its co-fragment radical. All energies are in kcal/mol.

Generic image for table
Table II.

Contributions of parallel and perpendicular transitions to the anisotropy parameter (β) for the Br and Br* channels upon photodissociation of BTFP and BMHFP at 234 nm.

Generic image for table
Table III.

The non-adiabatic curve crossing probability, P, and the partial absorptions, ɛ, of the 3Q0 and 1Q1 + 3Q1 states for BTFP and BMHFP at 234 nm.

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/content/aip/journal/jcp/134/19/10.1063/1.3591373
2011-05-20
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Photodissociation dynamics of 3-bromo-1,1,1-trifluoro-2-propanol and 2-(bromomethyl) hexafluoro-2-propanol at 234 nm: Resonance-enhanced multiphoton ionization detection of Br (2Pj)
http://aip.metastore.ingenta.com/content/aip/journal/jcp/134/19/10.1063/1.3591373
10.1063/1.3591373
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