✦ LIBER ✦

Excitation-energy dependence of phosphorescence quantum yield of benzaldehyde vapour at low pressure

✍ Scribed by Takao Itoh; Takeshi Takemura; Hiroaki Baba

Publisher: Elsevier Science
Year: 1976
Tongue: English
Weight: 269 KB
Volume: 40
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(76)85123-8

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✦ Synopsis

The phosphorescence quantum yield of benzaldehyde vapour was measured at low pressure (down to 2 mtorr) as a function of excitation wavelen$h. The quantum yield is essentially constant in the range of excitation energy corresponding to the S 1 (n, n*) state, but it decreases very rapidty as the excitation energy is raised to the value corresponding to S~(S, a*), indicating that the phosphorescence property of the benzaldehyde molecule varies, depending on the nature of the singlet state to which the molecule is initially excited.

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