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Single vibronic level photochemistry of formaldehyde (H2CO, 1A2): Radiative and non-radiative transitions

✍ Scribed by Richard G. Miller; Edward K.C. Lee

Publisher: Elsevier Science
Year: 1975
Tongue: English
Weight: 379 KB
Volume: 33
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(75)85463-7

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✦ Synopsis

Flllorescence decay times and fluorescence emission quantum yields from various single vibronic levels of the fust excited singlet shte of HzCO (x, 'AZ) have been measured. Radiative and non-radiative lifetimes of the sinmle vibronic levels have been determinti.

Surprisingly, the stronger promoting vibraticnal mode for the radiative transition % the asymmetric stretch mode (~2) rather than the out-oGphne bending mode (vi). The latter mode, however, is n promoting mode for the non-radiative transition. As much as a faclor of --40 variation in the or values is observed for the variety OF vibrational states studied.

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