Photoelectric Properties of Novel Conjugated Copolymers Based on 3, 4-Ethylenedioxythiophene and π-deficient aromatic rings

Four novel donor-accepter (D-A) conjugated polymers based on 3, 4- ethylenedioxythiophene and electron-deficient heterocycle rings were prepared, they have strong tendency to form self-assembled structure in the solid state, which is revealed by X-ray diffraction (XRD) patterns of them in powder. The UV-vis absorption spectroscopy, fluorescence emission spectroscopy and cyclic voltammertry studies suggest that the copolymers are expected to provide enhanced charge-transporting properties for the development of efficient electroluminescent materials. Furthermore, the third-order NLO measurements made with the single-beam Z-scan technique indicate that the copolymers have good third-order NLO response and are desired materials for fabricating nonlinear photonic devices.