Multiphoton dissociation dynamics of dimethyl selenide

Metal alkyls have been the targets of increased research interest as possible precursors for vapor-phase deposition of metal atoms and alloys. In particular, many of these compounds have potential uses as precursors for dopants in semiconductors, for building microstructures on silicon and other sur...

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Bibliographic Details
Published in:	Journal of physical chemistry (1952) Vol. 95; no. 18; pp. 6928 - 6932
Main Authors:	BelBruno, Joseph J, Spacek, Jennifer, Christophy, Elizabeth
Format:	Journal Article
Language:	English
Published:	Washington, DC American Chemical Society 01-09-1991
Subjects:	360601 - Other Materials- Preparation & Manufacture 400500 - Photochemistry ABSORPTION SPECTROSCOPY Atomic and molecular physics CHEMICAL REACTION KINETICS CHEMICAL REACTIONS CHEMISTRY DISSOCIATION DISSOCIATION ENERGY DYNAMIC MASS SPECTROMETERS ELECTROMAGNETIC RADIATION ENERGY ENERGY LEVELS Exact sciences and technology INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY KINETICS LASER RADIATION MASS SPECTROMETERS MASS SPECTROSCOPY MATERIALS SCIENCE MEASURING INSTRUMENTS Molecular properties and interactions with photons ORGANIC COMPOUNDS ORGANOMETALLIC COMPOUNDS PHOTOCHEMICAL REACTIONS PHOTOCHEMISTRY Photon interactions with molecules Physics RADIATIONS REACTION KINETICS RESONANCE IONIZATION MASS SPECTROSCOPY SELENIUM COMPOUNDS SPECTRA SPECTROMETERS SPECTROSCOPY TIME-OF-FLIGHT MASS SPECTROMETERS TIME-OF-FLIGHT SPECTROMETERS ULTRAVIOLET SPECTRA Organic selenide Time of flight method Visible radiation Ultraviolet spectrum Mass spectrum Yield Photodissociation Experimental study Multiphoton process Organic compounds
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Summary:	Metal alkyls have been the targets of increased research interest as possible precursors for vapor-phase deposition of metal atoms and alloys. In particular, many of these compounds have potential uses as precursors for dopants in semiconductors, for building microstructures on silicon and other surfaces, and for growing binary semiconductors. Dimethyl selenide photofragmentation by means of two-photon excitation through the structured, but dissociative, B{sup 1}A{sub 1} state has been studied via multiphoton-ionization time-of-flight mass spectrometry, UV spectrophotometry, and 2 + 1 REMPI. Atomic resonances indicating the formation of Se atoms were observed, and the formation of these atoms appeared to result from competitive dissociation channels. One of these channels involved the neutral fragmentation of the parent molecule followed by ionization of the fragments, while the second was characterized by direct ionization of the dimethyl selenide with subsequent fragmentation. Estimates of the rate constants for these processes were obtained from model calculations.
Bibliography:	ark:/67375/TPS-DJ9L5QTF-B istex:B034A81EB431921631E4F39625F0C3C14A958C46
ISSN:	0022-3654 1541-5740
DOI:	10.1021/j100171a036