Multi-resonant thermally activated delayed fluorescent (MR-TADF) compounds as photocatalysts

Callum Prentice, James Morrison, Andrew D. Smith*, Eli Zysman-Colman*

*Corresponding author for this work

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Donor-acceptor (D-A) thermally activated delayed fluorescent (TADF) compounds, such as 4CzIPN, have become a widely used sub-class of organic photocatalysts for a plethora of photocatalytic reactions. Multi-resonant TADF (MR-TADF) compounds, a subclass of TADF emitters that are rigid nanographene derivatives, such as DiKTa and Mes3DiKTa, have to date not been explored as photocatalysts. In this study both DiKTa and Mes3DiKTa were found to give comparable or better product yield than 4CzIPN in a range of photocatalytic processes that rely upon reductive quenching, oxidative quenching, energy transfer and dual photocatalytic processes. In a model oxidative quench process, DiKTa and Mes3DiKTa gave increased reaction rates in comparison to 4CzIPN, with DiKTa being of particular interest due to the lower material cost (£0.94/mmol) compared to that of 4CzIPN (£3.26/mmol). These results suggest that DiKTa and Mes3DiKTa would be excellent additions to any chemist’s collection of photocatalysts.
Original languageEnglish
Article numbere202202998
Number of pages9
JournalChemistry - A European Journal
Issue number2
Early online date14 Nov 2022
Publication statusPublished - 9 Jan 2023


  • Kinetics
  • Multi-resonant thermally activated delayed fluorescence (MR-TADF)
  • Photocatalysis
  • Thermally activated delayed fluorescence (TADF)


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