The fluorescence of the cis and trans forms of naphthyl-ethylenes

✍ Scribed by J. Klueger; G. Fischer; E. Fischer; Ch. Goedicke; H. Stegemeyer

• Publisher: Elsevier Science
• Year: 1971
• Tongue: English
• Weight: 271 KB
• Volume: 8
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(71)85011-x

✦ Synopsis

Fluorescence spectra and quantum yields of the two l-phenyl-2-naphthyl ethylenes and the three I, 2dinaphthyl ethylenes were studied behveen + 250 and -1800, both of the ferns and cis isomers, Contrary to recent reports by other authors we find a close similarity between the fluorescence behaviour of the tcvo isomers of stilbene and the above five compounds. The fluorescence spectra of the cis isomers are unstructured and red-shifted in comparison with the trans isomers.

The quantum yield of the trans iscmere is 0.8 -0.9, that of the cis iaomers co.01 at temperatures above -100°, but increases sharply on cooling.