Wu Haoqun, Shi Lijuan, Yang Chao, Wang Yongtao, Wang Xiaojuan, Ma Lei
Guangxi Key Laboratory of Electrochemical and Magneto-chemical Function Materia, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.
Guangxi Key Laboratory of Electrochemical and Magneto-chemical Function Materia, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2026 Jan 5;344(Pt 1):126667. doi: 10.1016/j.saa.2025.126667. Epub 2025 Jul 7.
Crystalline room temperature phosphorescence (RTP) materials combined with chirality and excitation-dependent properties hold significant application value and play a crucial role in elucidating intrinsic RTP mechanisms. Here, four guests and a host material named APET-H, APET-F, APET-Cl, APET-Br, and BCN were designed and synthesized in turn, with non-conjugated structures features and multiple electron rich functional groups. The guest materials showed different chirality features and high-contrast RTP in crystalline state, with optical rotation of -15.8° to 2°, RTP lifetimes of 69-256 ms, and afterglow lifetimes of 0.3-3 s. More importantly, APET-F and APET-Cl presented excitation dependent RTP in crystalline state and concentration dependent fluorescence emission in solution. By host-guest doping, RTP and afterglow lifetimes were significantly promoted, with RTP lifetimes of 342-399 ms and afterglow lifetimes of 4-6 s. More importantly, the doping systems showed similar fluorescence and RTP emission maxima, but with different RTP lifetimes. Thereby, the advanced-level anti-counterfeiting pattern and information encryption could be achieved by choosing the above crystals and doping systems. Finally, the underlying luminescent mechanisms were discussed in detail based on crystal analysis and theoretical calculations.
结合手性和激发依赖性特性的结晶室温磷光（RTP）材料具有重要的应用价值，在阐明固有RTP机制方面发挥着关键作用。在此，依次设计并合成了四种客体材料和一种主体材料，分别命名为APET-H、APET-F、APET-Cl、APET-Br和BCN，它们具有非共轭结构特征和多个富电子官能团。客体材料在结晶状态下表现出不同的手性特征和高对比度RTP，旋光度为-15.8°至2°，RTP寿命为69 - 256毫秒，余辉寿命为0.3 - 3秒。更重要的是，APET-F和APET-Cl在结晶状态下呈现激发依赖性RTP，在溶液中呈现浓度依赖性荧光发射。通过主客体掺杂，RTP和余辉寿命显著提高，RTP寿命为342 - 399毫秒，余辉寿命为4 - 6秒。更重要的是，掺杂体系显示出相似的荧光和RTP发射最大值，但具有不同的RTP寿命。因此，通过选择上述晶体和掺杂体系可以实现高级防伪图案和信息加密。最后，基于晶体分析和理论计算详细讨论了潜在的发光机制。
