Dithia[3.3]paracyclophane Core: A Versatile Platform for Triplet State Fine-Tuning and Through-Space TADF Emission

Morgan Auffray, Dae Hyeon Kim, Jong Uk Kim, Fatima Bencheikh, David Kreher, Qisheng Zhang, Anthony D'Aléo, Jean Charles Maurice Ribierre, Fabrice Dominique Mathevet, Chihaya Adachi

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3 Citations (Scopus)

Abstract

Thermally activated delayed fluorescence (TADF) based on through-space donor and acceptor interactions constitute a recent and promising approach to develop efficient TADF emitters. Novel TADF isomers using a dithia[3.3]-paracyclophane building block as a versatile 3D platform to promote through-space interactions are presented. Such a 3D platform allows to bring together the D and A units into close proximity and to probe the effect of their orientation, contact site and distance on their TADF emission properties. This study provides evidence that the dithia[3.3]paracyclophane core is a promising platform to control intramolecular through-space interactions and obtain an efficient TADF emission with short reverse-intersystem crossing (RISC) lifetimes. In addition, this study demonstrates that this design can tune the energy levels of the triplet states and leads to an upconversion from 3CT to 3LE that promotes faster and more efficient RISC to the 1CT singlet state.

Original languageEnglish
Pages (from-to)1921-1925
Number of pages5
JournalChemistry - An Asian Journal
Volume14
Issue number11
DOIs
Publication statusPublished - Jun 3 2019

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Organic Chemistry

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    Auffray, M., Kim, D. H., Kim, J. U., Bencheikh, F., Kreher, D., Zhang, Q., D'Aléo, A., Ribierre, J. C. M., Mathevet, F. D., & Adachi, C. (2019). Dithia[3.3]paracyclophane Core: A Versatile Platform for Triplet State Fine-Tuning and Through-Space TADF Emission. Chemistry - An Asian Journal, 14(11), 1921-1925. https://doi.org/10.1002/asia.201900401