Symmetrical and non-symmetrical 2,5-diaryl-1,3,4-oxadiazoles: synthesis and photophysical properties
作者:Codruţa C. Paraschivescu、Niculina D. Hădade、Anca G. Coman、Arnaud Gautier、Federico Cisnetti、Mihaela Matache
DOI:10.1016/j.tetlet.2015.05.005
日期:2015.6
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
我们在此报告了既含给电子取代基又含吸电子取代基的2,5-二芳基-1,3,4-恶二唑以及含电子的双-和tris-2,5-二取代-1,3,4-恶二唑的合成-供体取代基。使用UV-Vis和荧光光谱法研究了合成化合物的光物理性质。发现芳基取代图案对发光效率和其他光物理性质均具有显着影响。给电子基团数和/或杂环数的增加提供了发射最大值的红移,以及斯托克斯位移的增加。对于在芳环上具有推挽式取代基的单1,3,4-恶二唑也观察到了相同的效果。