Issue 47, 2022

Pyrrolo[3,4-c]pyridine-1,2-dione: a new electron acceptor for electrochromic conjugated polymers

Abstract

A new pyrrolo[3,4-c]pyridine-1,2-dione (PPyD) electron acceptor was synthesized via the Diels Alder reaction between N-alkyl maleimide dienophile and 1,2,4-triazine moieties. PPyD was subsequently used to construct five donor–acceptor type conjugated polymers, P1–P5, with thiophene-based donors. The electrochromic properties of the five polymers were studied, showing that the polymers exhibit a range of colours from orange to red and magenta in the neutral state, and switch to blue, green, and yellow, upon applying positive voltages. Good optical contrasts of up to 70.5%, fast switching speeds down to 3.2 s and high colouration efficiencies up to 590 C cm−2 were recorded. This work demonstrates the potential of the novel PPyD acceptor as a promising building block for electrochromic conjugated polymers, and probably other organic electronics.

Graphical abstract: Pyrrolo[3,4-c]pyridine-1,2-dione: a new electron acceptor for electrochromic conjugated polymers

Supplementary files

Article information

Article type
Paper
Submitted
04 Jul 2022
Accepted
08 Nov 2022
First published
11 Nov 2022

Polym. Chem., 2022,13, 6512-6524

Pyrrolo[3,4-c]pyridine-1,2-dione: a new electron acceptor for electrochromic conjugated polymers

T. P. Vo, M. H. Chua, S. J. Ang, K. L. O. Chin, X. Y. D. Soo, Z. M. Png, T. L. D. Tam, Q. Zhu, D. J. Procter and J. Xu, Polym. Chem., 2022, 13, 6512 DOI: 10.1039/D2PY00863G

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