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|Type:||Artigo de periódico|
|Title:||The Unimolecular Reaction Of (ch3)3cno Following N-π* Excitation With A Tunable Dye Laser|
|Abstract:||The predissociation of (CH3)3CNO following the 570-710 nm laser excitation of the n-π transition is reported. The small fluorescence quantum yield and its short lifetime (<20 ns) indicate efficient radiationless processes prior to dissociation. NO is the major dissociation product and its concentration was monitored in real time by using the two-photon laser excited fluorescence technique. The NO yield as a function of wavelength followed very closely the absorption contours of (CH3) 3CNO. The NO production rate was > 108 s-1 at all wavelengths studied and this rate is too fast to be consistent with a mechanism involving a radiationless transition to the ground electronic state followed by energy randomization and dissociation. Alternative predissociation mechanisms are considered. © 1983 American Institue of Physics.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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