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

Kealan J. Fallon, Nilushi Wijeyasinghe, Anastasia Leventis, Jose M. Marin-Beloqui, Daniel T.W. Toolan, Mohammed Al-Hashimi, Tracey M. Clarke, Thomas D. Anthopoulos, Hugo Bronstein*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)4200-4205
Number of pages6
JournalJournal of Materials Chemistry C
Volume9
Issue number12
DOIs
Publication statusPublished - Mar 2021
Externally publishedYes

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