Pyrimidine‐Based Four‐Coordinate O^N^O Boron Complexes: Synthesis, Photophysical and Theoretical Studies, and TADF‐Based OLED Devices
This article describes the synthesis, along with the full photophysical and computational characterization, of a series of push-pull boron complexes comprising a sterically hindered donor connected to a pyrimidine-based O^N^O boron chelate. The dimethylacridan-functionalized fluorophore appears to be the most emissive in the series, both in toluene solution and in the solid state (as a powder), displaying thermally activated delayed fluorescence (TADF) emission in degassed media due to a small singlet-triplet energy gap. This result is in line with a previously reported pyridine analogue, which also exhibits delayed emission. Incorporation of this TADF compound into an organic light-emitting diode led to the observation of intense electroluminescence, with EQE<sub>max</sub> values reaching 9.7% at a 5 wt% doping concentration.
Authors
- Denis Tondelier (ORCID: https://orcid.org/0000-0003-1065-1977)
- Amparo Navarro (ORCID: https://orcid.org/0000-0001-9620-6668)
- Sonia B. Jiménez‐Pulido (ORCID: https://orcid.org/0000-0003-2053-9057)
- Sébastien Gauthier (ORCID: https://orcid.org/0000-0002-3966-2410)
- Nuria A. Illán‐Cabeza (ORCID: https://orcid.org/0000-0002-1646-8383)
- Sylvain Achelle (ORCID: https://orcid.org/0000-0002-9226-7735)
- Clément Diguet
- M. Paz Fernández‐Liencres (ORCID: https://orcid.org/0000-0003-3831-3427)
- Adah Almutairi (ORCID: https://orcid.org/0000-0001-5339-0207)
- Julien Massue (ORCID: https://orcid.org/0000-0002-0629-4949)
- Julián Rodríguez‐López
- Françoise Robin le Guen
Institutions
- Centre National de la Recherche Scientifique (FR)
- École Polytechnique (FR)
- Universidad de Jaén (ES)
- Institut des Sciences Chimiques de Rennes (FR)
- Laboratoire de Physique des Interfaces et des Couches Minces (FR)
- Institut de Chimie (FR)
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (FR)
- Université de Rennes (FR)
- University of Castilla-La Mancha (ES)
Publication Details
- Journal
- Chemistry - A European Journal
- Published
- 2025-05-09
- DOI
- https://doi.org/10.1002/chem.202501089
- Citations
- 3
- Primary Topic
- Organic Light-Emitting Diodes Research
- Type
- article
- Field-Weighted Citation Impact
- 2.19
Funders
- Agence Nationale de la Recherche
- Centre National de la Recherche Scientifique
- Universidad de Granada
- Universidad de Jaén
- Junta de Andalucía
- Junta de Comunidades de Castilla-La Mancha