Some photophysical properties of new oligomer obtained from anodic oxidation of 4,4′-dimethoxychalcone

Some photopysical properties of a new oligomer obtained from the anodic oxidation of the 4,4'-dimethoxy-chalcone were investigated using different and complementary techniques. Firstly, TGA analysis and X-Ray diffraction experiments showed that the oligomer is thermally stable up to 500 K and partially organized at the solid state, respectively. Secondly, the optical properties of the oligomer were studied in solution and in the solid state. The optical band gap was estimated to be 3.17 eV in solution state and 2.70 eV in film state. What's more, the fluorescence decay is determined showing a considerably faster in the film state (0.183 ns) than in solution state (1.606 ns), due to the rapid non-radiative decay at inter chain trap sites. (C) 2018 Elsevier B.V. All rights reserved.