Abstract
Two quinoxaline-based polymers, in which the electron-donating 2-octyldodecyl modified benzodithiophene (BDT) group was connected to the electron-accepting 2,3-diphenyl quinoxaline (Qx) derivatives through a thiophene bridge, were synthesized by the Stille coupling reaction. Interestingly, the strong electron-withdrawing trifluoromethyl (CF3) substituents were introduced at para-position of the benzene ring at 2,3-positions Qx to yield PBDT-CF3Qx. Moreover, two fluorine atoms were incorporated at the 6,7-positions of Qx in PBDT-CF3Qx to produce PBDT-CF3QxF. This simple approach demonstrate the effect of multiple electron-withdrawing moieties on the optical, electrochemical, and photovoltaic properties of Qx-based polymers.
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