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A time-resolved tunable diode laser study of the photodissociation dynamics of W(CO)6

✍ Scribed by John P. Holland; Robert N. Rosenfeld

Publisher: Elsevier Science
Year: 1988
Tongue: English
Weight: 443 KB
Volume: 145
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(88)87406-2

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✦ Synopsis

Time-resolved diode laser absorption spectroscopy has been used to study the photodissociation of W ( CO)a following excitation at 35 1 nm. The narrow linewidth ( z I 0m4 cm-' ) and tunability of this infrared source allows the nascent rotation-vibrational energy distribution of the CO product to be determined. Additionally, translational energy disposal can be characterized by measurements of the shapes of individual rotation-vibration lines. Our results indicate that energy is partitioned preferentially to product translational and vibrational, rather than rotational, motion for the 35 1 nm photofragmentation of W(CO)6.

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Time-resolved diode laser absorption spectroscopy is used to probe Cl atoms produced from the photolysis of a number of molecular precursors at excimer laser wavelengths 193,248 and 308 nm. The diode laser was tuned to the Cl atom tine structure transition, 2PJ,2+2P,,2. For 248 and 193 nm photolysis