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Tyrian purple: an ancient natural dye for cross-conjugated n-type charge transport

Fallon, KJ; Wijeyasinghe, N; Leventis, A; Marin-Beloqui, JM; Toolan, DTW; Al-Hashimi, M; Clarke, TM; ... Bronstein, H; + view all (2021) Tyrian purple: an ancient natural dye for cross-conjugated n-type charge transport. Journal of Materials Chemistry C , 9 (12) pp. 4200-4205. 10.1039/d0tc05553k. Green open access

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Abstract

Herein, we present two novel organic semiconducting polymers synthesised from an ancient dye. By employing cross-conjugation within the polymer backbone as a synthetic strategy, we are able to engineer optical gaps such that the novel materials absorb over the entire visible spectrum. The cross-conjugated polymers exhibited relatively high n-type charge transport performance in organic field-effect transistors, a rare characteristic for this type of polymer. Quantum chemical calculations provide insight into this behaviour, suggesting that, whilst conjugation along the HOMO is indeed inhibited via molecular design, these materials possess highly delocalized LUMOs, facilitating high n-type charge transport.

Type: Article
Title: Tyrian purple: an ancient natural dye for cross-conjugated n-type charge transport
Open access status: An open access version is available from UCL Discovery
DOI: 10.1039/d0tc05553k
Publisher version: https://doi.org/10.1039/d0tc05553k
Language: English
Additional information: This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence (http://creativecommons.org/licenses/by-nc/3.0/).
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/10126090
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