With the increasing demand for multifunctional aggregation-induced emission materials, four pyridine-based difluoroboron compounds (, , , and ) with the anthryl unit as an electron donor and difluoroboron moiety as the electron acceptor were designed and successfully synthesized. It found that four compounds displayed significantly intramolecular charge transfer characteristics and solvatochromism phenomena. The other compounds possessed mechanofluorochromic behaviors under external mechanical stimulation except compound , owing to its lesser change value of the dipole moment between the ground and excited states. More importantly, they exhibited potential application in the field of ink-free writing due to reversible mechanochromism during the grinding and fumigation process. Additionally, four compounds were used for detection of latent fingerprints on the glass surface due to their excellent aggregation effects in the THF/water mixtures. This research provides a reference for exploring multifunctional aggregation-induced emission difluoroboron compounds with brightness luminescence.

中文翻译：

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四种吡啶基二氟硼化合物的机械荧光变色行为、无墨书写和潜指纹检测的研究


随着对多功能聚集诱导发光材料的需求不断增加，设计并成功合成了四种以蒽基单元为电子供体、二氟硼部分为电子受体的吡啶基二氟硼化合物(、、、和)。发现四种化合物表现出显着的分子内电荷转移特征和溶剂化显色现象。除 化合物外，其他化合物由于其基态和激发态之间的偶极矩变化值较小，在外部机械刺激下均具有机械荧光变色行为。更重要的是，由于研磨和熏蒸过程中的可逆机械致变色现象，它们在无墨书写领域展示了潜在的应用。此外，由于四种化合物在 THF/水混合物中具有优异的聚集效应，因此可用于检测玻璃表面的潜在指纹。该研究为探索具有亮度发光的多功能聚集诱导发光二氟硼化合物提供了参考。