Brominated B₁‑Polycyclic Aromatic Hydrocarbons for the Synthesis of Deep-Red to Near-Infrared Delayed Fluorescence Emitters

Bromo-functionalized B1-polycyclic aromatic hydrocarbons (PAHs) with LUMOs of less than −3.0 eV were synthesized and used in cross-couplings to form donor–acceptor materials. These materials spanned a range of S1 energies, with a number showing thermally activated delayed fluorescence and significant emission in the near-infrared region of the spectrum. These B1-PAHs represent a useful family of acceptors that can be readily synthesized and functionalized.本研究合成了最低未占据分子轨道（LUMO）能级低于-3.0 eV的溴官能化B1型多环芳烃（polycyclic aromatic hydrocarbons，PAHs），并将其用于交叉偶联反应以制备给体-受体材料。这类材料的第一单重激发态（S₁）能量覆盖了较宽范围，其中多款材料展现出热激活延迟荧光特性，并在光谱近红外区产生显著发射。此类B1-PAHs作为一类极具应用价值的受体材料家族，可便捷地进行合成与官能化修饰。