Abstract
Simultaneous electron paramagnetic resonance (EPR) and electrochemical measurements have been carried out on polyfluorene prepared by monomer oxidation and utilized in an ambient temperature ionic liquid consisting of 1-methyl-3-ethylimidazolium chloride-aluminum chloride. A considerable EPR signal is observed in both the reduced and oxidized states; the EPR signal achieves a maximum value coincident with the peak current during a cyclic voltammogram. Assuming that the process is two one-electron steps, initially forming a radical cation, the difference between the two E 0 values is estimated as less than 70 mV.
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