✦ LIBER ✦

Laser-induced phosphorescence of jet-cooled pyrimidine

✍ Scribed by Ch. Ottinger; A.F. Vilesov; T. Winkler

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 757 KB
Volume: 208
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(93)89079-w

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✦ Synopsis

Laser-induced phosphorescence excitation spectra of pyrimidine molecules have been observed under molecular beam conditions. The origin of the lowest triplet state T, ('B,) was measured to be at 28534.0 cm-'. More than 30 vibrational bands of the TttSa transition were observed in the region E=O-1300 cm-t from the origin. High-resolution (0.03 cm-') laser scans of the most intense bands show parallel type contours. Lifetimes of selected T, state vibrational bands were measured to be 3 400 ps for the origin, decreasing to 55 ps at E= 1261.0 cm-'.

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