500-fold amplification of small molecule circularly polarised luminescence through circularly polarised FRET

Wade, Jessica, Brandt, Jochen R., Reger, David, Zinna, Franesco, Amsharov, Konstantin Y., Jux, Norbert, Andrews, David and Fuchter, Matthew J. (2020) 500-fold amplification of small molecule circularly polarised luminescence through circularly polarised FRET. Angewandte Chemie. ISSN 0044-8249

[img] PDF (Accepted_Manuscript) - Submitted Version
Restricted to Repository staff only until 8 October 2021.

Download (694kB) | Request a copy

Abstract

Strongly dissymmetric circularly polarised (CP) luminescence from small organic molecules could transform a range of technologies, such as display devices. However, highly dissymmetric emission is usually not possible with small organic molecules, which typically give dissymmetric factors of photoluminescence (gPL) less than 10-2. Here we describe an almost 103-fold chiroptical amplification of a π-extended superhelicene when embedded in an achiral conjugated polymer matrix. This combination increases the |gPL| of the superhelicene from approximately 3 × 10-4 in solution to 0.15 in a blend film in the solid-state. We propose that the amplification arises not simply through a chiral environment effect, but instead due to electrodynamic coupling between the electric and magnetic transition dipoles of the polymer donor and superhelicene acceptor, and subsequent CP Förster resonance energy transfer. We show that this amplification effect holds across several achiral polymer hosts and thus represents a simple and versatile approach to enhance the g-factors of small organic molecules.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
Depositing User: LivePure Connector
Date Deposited: 05 Oct 2020 23:59
Last Modified: 20 Oct 2020 23:57
URI: https://ueaeprints.uea.ac.uk/id/eprint/77124
DOI: 10.1002/anie.202011745

Actions (login required)

View Item View Item