The synthesis and characterisation of fluorescent poly(heteroaromatic oxadiazole)s

Five polymers comprising alternating electron-donating thiophene and electr on-withdrawing oxadiazole units have been synthesised by polycondensation r eaction. The optical and charge transporting properties of the polymers wer e investigated by UV-Vis absorption spectroscopy, fluorescence emission spe ctroscopy omit cyclic voltammetry. Thermal stability of the polymers has al so been studied. All polymers depicted blue fluorescence and high fluoresce nce quantum efficiency,The influence of the introduction of an electron-don ating alkoxy grey, to both the 3- and 4-positions of the thiophene ring and the length of the alkoxy side chain on properties of the polymers were dis cussed.