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6.3.2 Polymeric Material Synthesis

DOI: 10.1055/sos-SD-236-00125

Villani, E.; Inagi, S.Science of Synthesis: Electrochemistry in Organic Synthesis, (20211166.

Bipolar electrochemistry has been widely employed for the synthesis of novel polymeric materials. For example, Inagi and co-workers demonstrated that AC bipolar electropolymerization of 3,4-ethylenedioxythiophene (EDOT, 8) as a monomer results in the formation of microfibers of the corresponding poly(3,4-ethylenedioxythiophene) (PEDOT, 9) from both terminals of the bipolar electrode (BPE)[‌56‌] (Scheme 5 and Figure 12, e). When a gold wire employed as a BPE is placed in between the driving electrodes in an electrolytic solution containing EDOT monomer (8), benzo-1,4-quinone (10), and a low concentration of tetrabutylammonium perchlorate (Bu4NClO4), the application of an AC voltage activates the gold wire, leading to the simultaneous electropolymerization of EDOT (8) and sacrificial reduction of benzo-1,4-quinone (10) at both poles of the BPE. Hence, the AC electrolysis results in the formation of PEDOT (9) microfibers (5 µm in diameter) that propagate dendritically from both terminals of the BPE in parallel to the direction of the external electric field.

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