Hui, B. Y. K., Chin, K. L. O., Lim, J. J. L., Soo, X. Y. D., Lu, X., Zhu, Q., Liu, X., Xu, J., & Chua, M. H. (2024). Strategies to Enhance the Electrochromic Properties of Conjugated Polymers Bearing Pyromellitic Diimide Acceptors. Chemistry – An Asian Journal. Portico. https://doi.org/10.1002/asia.202400236
Abstract:
AbstractA series of conjugated polymers bearing thiophene‐based donors and pyromellitic diimide (PMDI) acceptor were prepared, and their electrochromic (EC) properties were studied via using fabricated thin‐film EC devices. It was observed that structurally regular alternating polymers with fewer (1 and 2) thiophene donors do not exhibit any EC properties while increasing the number of donors eventually led to the emergence of orange‐red‐to‐green colour switching. On this basis, two more random co‐polymers containing higher donor‐to‐acceptor ratios were synthesized to further improve EC switching properties. The two polymers, which bear a PMDI‐to‐thiophene ratio of ca. 1 : 7 and 1 : 8, revealed orange red‐to‐blue colour switching and generally improved optical contrasts and switching speeds in both the visible and near infra‐red (NIR) region. In addition, the subtle modulation of polymer colour and hue via variation of the number of thiophene donors was evident through colorimetric study. This work therefore demonstrates the potential and possibility of using the PMDI acceptor unit to construct EC‐active conjugated polymers, and considerations for future tuning of colour and switching performances.
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Funding Info:
This research / project is supported by the A*STAR - A*STAR 2020 Career Development Fund
Grant Reference no. : C210112042
This research / project is supported by the A*STAR - HTCO Seed Fund
Grant Reference no. : C231218001
Description:
This is the peer reviewed version of the following article: Hui, B. Y. K., Chin, K. L. O., Lim, J. J. L., Soo, X. Y. D., Lu, X., Zhu, Q., Liu, X., Xu, J., & Chua, M. H. (2024). Strategies to Enhance the Electrochromic Properties of Conjugated Polymers Bearing Pyromellitic Diimide Acceptors. Chemistry – An Asian Journal. Portico. https://doi.org/10.1002/asia.202400236, which has been published in final form at doi.org/10.1002/asia.20240023. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited