A novel electrochromic polymer containing triphenylamine derivative and pyrrole

A novel conducting polymer was successfully synthesized via electropolymerization of N1,N4-bis(4-(1H-pyrrol-1-yl)phenyl)-N1,N4-diphenylbenzene-1,4-diamine (DPTPA). This polymer film exhibited six various colors under different potentials. Besides, this polymer film showed high optical contrast (41% at 852 nm, 52% at 617 nm) and fast switching time (1.3 s at 410 nm, 1.4 s at 852 nm and 0.6 s at 617 nm). Cyclic voltammogram and electro-optical study showed that the polymer film has a stable and well-defined reversible redox process as well as electrochromic behavior.

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► PDPTPA film possesses six various colors from brown to blue.
► PDPTPA film has fast switching time (1.3 s at 410 nm, 1.4 s at 852 nm and 0.6 s at 617 nm).
► PDPTPA film shows high optical contrast (41% at 852 nm, 52% at 617 nm).
► PDPTPA film exhibits excellent stability.