Photophysics of PBD derivatives. I. The fluorescence of para-biphenylyl-substituted 2-(biphenyl-4′-yl)-5-phenyl-1,3,4-oxadiazoles
✍ Scribed by Stanislav Luňák Jr.; Miloš Nepraš; Antonín Kurfürst; Josef Kuthan
- Book ID
- 107942786
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 793 KB
- Volume
- 170
- Category
- Article
- ISSN
- 0301-0104
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## Abstract The synthesis of potential fluorescent active 4‐(5‐aryl‐1,3,4‐oxadiazol‐2‐yl)phenylhydrazine derivatives was accomplished in three steps. The key step was the dehydration cyclization of 1,2‐diacylhydrazines to form the 1,3,4‐oxadiazole ring by use of acetic anhydride/perchloric acid mix
4 theoretics1 spprosch using a SCF Ci method has been used to analyse the Tt -T,, absorption spectrum of Z,Sdiphcnyl-1,3.4-oxadiazole. In its fist rriplct state in ;1 non-polarsolvent, thismoleculcis strongly non-plsnar\_This conclusion is corroborated by comparison of the fluorescence and phosphore