Abstract
Abstract Boron-containing antiaromatics, such as diborinines and boroles, have sparked interest in materials chemists owing to their exciting optical properties and high Lewis acidity. In this study, we synthesized donor–acceptor (D–A) type diborinines fused with thiophene rings by introducing electron-donating amino-substituted aryl groups onto boron and elucidated their properties. The D–A type dithienodiborinines exhibited long-wavelength absorption arising from their D–A interactions and antiaromaticity. In addition, their fluorescence intensity increased under oxygen-free conditions, indicating thermally activated delayed fluorescence.
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