Synthesis, characterization and optoelectronic investigations of thiophene substituted 1,3,4-oxadiazole derivatives as fluorescent materials

We have designed and synthesized a novel series of unsymmetrical small bipolar organic molecules 5(a-h) via the palladium catalyzed Suzuki coupling reaction. The structural identities and purities were confirmed by 1H NMR, 13C NMR, IR and MS and were found to be in good agreement with the proposed structures. We have studied the photophysical and thermal properties of the synthesised compounds with UV-Vis/fluorescence spectroscopy, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The systematic investigations of photophysical and thermal properties of newly synthesised compounds were performed with a view to under their suitability in optoelectronics.