The study shows successful synthesis of unique diazaborepin isomers with distinctive properties, suggesting potential applications in photonics.
An unsymmetric diazaborepin framework NBNH was synthesized, featuring a fused 6/5/7-ring core. Further π-extension via meta- and para-N-π-N arrangements afforded two bis-diazaborepin-embedded isomers m-dNBNH and p-dNBNH. The two isomers display distinct frontier molecular orbital distributions, and the para isomer p-dNBNH exhibits a photoluminescence quantum yield of 100%. All three compounds exhibit singlet-oxygen sensitization and pronounced antiaromatic character for the diazaborepin units.
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Chen et al. (2026) studied this question.
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