Symmetrical and non-symmetrical 2,5-diaryl-1,3,4-oxadiazoles: synthesis and photophysical properties. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Tetrahedron Letters Année : 2015

Symmetrical and non-symmetrical 2,5-diaryl-1,3,4-oxadiazoles: synthesis and photophysical properties.

Résumé

We report herein the synthesis of 2,5-diaryl-1,3,4-oxadiazoles containing both electron-donating and withdrawing substituents as well as bis- and tris-2,5-disubstituted-1,3,4-oxadiazoles containing electron-donating substituents. The photophysical properties of the synthesized compounds were studied using UV–Vis and fluorescence spectroscopy. The aryl substitution pattern was found to have a marked impact on both luminescence efficiency and other photophysical properties. An increase in the number of electron-donating groups and/or the number of heterocyclic rings provided a red shift of the emission maxima, as well as an increase of the Stokes shifts. The same effect was observed for mono-1,3,4-oxadiazoles containing push–pull substituents on the aryl rings.
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Dates et versions

hal-01206852 , version 1 (29-09-2015)

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Codruţa C. Paraschivescu, Niculina D. Hădade, Anca G. Coman, Arnaud Gautier, Federico Cisnetti, et al.. Symmetrical and non-symmetrical 2,5-diaryl-1,3,4-oxadiazoles: synthesis and photophysical properties.. Tetrahedron Letters, 2015, 56, pp.3961-3964. ⟨10.1016/j.tetlet.2015.05.005⟩. ⟨hal-01206852⟩
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