Authors
Hua-Xiu Ni, Lei Hua, Jia-Jun Hu, Li Yuan, Yafei Wang, You-Xuan Zheng
Published in
Angewandte Chemie (International ed. in English). Pages e7100719. Jul 26, 2026. Epub Jul 26, 2026.
Abstract
In multiple-resonance-induced thermally activated delayed fluorescence (MR-TADF) materials with a meta B-π-B configuration, most studies mainly focused on linear multi-boron frameworks. In this study, we report two macrocyclic dual- and tetra-borated MR-TADF materials based on tetraazacyclophane (DPN2B and DPN4B). By rationally selecting boron sources and reaction conditions, one-pot double and quadruple borylation reactions were achieved. In toluene, DPN2B and DPN4B exhibit deep blue narrowband emission peaking at 451 and 442 nm, with full widths at half maximum of 22 and 25 nm, respectively. Solution-processed organic light-emitting diodes (OLEDs) based on DPN2B and DPN4B show pure-blue electroluminescence with peaks at 458 and 452 nm, with maximum external quantum efficiencies of 6.4% and 4.0%, respectively. The DPN2B-based device achieves Commission Internationale de l'Éclairage coordinates of (0.14 and 0.07). This work provides a practical macrocyclic molecular design strategy for developing multi-borated MR-TADF emitters and OLEDs.
PMID:
42503200
Bibliographic data and abstract were imported from PubMed on 27 Jul 2026.
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