ArticleNature chemistry2026
Unlocking red-to-near-infrared luminescence via ion-pair assembly in carbodicarbene borenium ions.
Article in Nature chemistry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Achieving efficient red and near-infrared (NIR) emission in boron cation-based emitters remains challenging owing to their intrinsic instability, strong electrophilicity of the boron centre and pronounced non-radiative decay governed by the energy gap law. Here we report a family of air- and moisture-stable carbodicarbene (CDC)-borabenzo[c]anthanthrenium ions exhibiting solid-state red-to-NIR luminescence (maximum emission wavelength up to 730 nm) with competitive quantum yields. Crystallographic, photophysical and computational analyses reveal that the CDC ligand plays a dual role by electronically stabilizing the boron centre and directing ion-pair assembly via charge localization, thereby modulating exciton coupling and aggregate-state emission. These cationic π-extended boron frameworks represent rare examples of monoboron-doped luminophores displaying deep-red-to-NIR emission. Our findings highlight that the combination of π-extension, a charge-directing CDC ligand and ion-pair assembly constitutes an effective strategy to access efficient red/NIR emitters, providing guiding principles for the design of functional long-wavelength emitting main-group materials.
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