Abstract Fabrication of efficient solid luminogens with tunable emission is both fundamentally significant and technically important. Herein, based on our previous strategy for the construction of efficient and multifunctional solid luminogens through the combination of diverse aggregation-induced emission (AIE) units with other functional moieties, a group of luminophores with electron donor-acceptor (D-A) structure and typical intramolecular charge transfer (ICT) characteristics, namely CZ-DCDPP, DPA-DCDPP and DBPA-DCDPP were synthesized and investigated. The presence of twisting and AIE-active 2,3-dicyano-5,6-diphenylpyrazine (DCDPP) moiety endows them highly emissive in the solid states, whereas the introduction of arylamines with varied electron-donating capacity and different conjugation render them with tunable solid emissions from green to red. While CZ-DCDPP and DPA-DCDPP solids exhibit distinct mechanochromism, both DPA-DCDPP and DBPA-DCDPP solids can generate efficient red emission. Owing to their high efficiency, remarkable thermal and morphological stabilities and moreover red emission, they are promising for diverse optoelectronic and biological applications.

中文翻译：

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具有可调节排放的DA结构的高效固体发光剂：分子设计和光物理性质

摘要具有可调发射的高效固态发光剂的制备具有根本的意义和技术重要性。在此，根据我们先前的策略，通过将多种聚集诱导发射（AIE）单元与其他功能部分，一组具有电子供体-受体（DA）结构和典型分子内结构的发光体相结合，构建高效且多功能的固态发光剂合成并研究了电荷转移（ICT）特性，即CZ-DCDPP，DPA-DCDPP和DBPA-DCDPP。扭曲和具有AIE活性的2,3-二氰基-5,6-二苯基吡嗪（DCDPP）部分的存在使它们在固态中具有高发射率，而引入具有不同供电子能力和不同共轭作用的芳基胺则使它们具有从绿色到红色的可调固体发射。虽然CZ-DCDPP和DPA-DCDPP固体表现出明显的机械变色现象，但DPA-DCDPP和DBPA-DCDPP固体均可以产生有效的红色发射。由于它们的高效率，出色的热和形态稳定性以及红色发射，它们有望用于各种光电和生物应用。