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研究论文

一种用于防伪和潜指纹检测的双功能三苯胺基荧光染料

陈春琳, 谭杰, 张帮翠, 董官茞, 杨艳华*, 李湘广*, 高树林*   

  1. 昆明学院 化学化工学院 云南省金属有机分子材料与器件重点实验室 昆明 650214
  • 收稿日期:2025-10-18 修回日期:2025-11-03
  • 基金资助:
    国家大学生创新创业计划训练(No. 202411393015), 云南省“兴滇英才支持计划”青年人才专项(No. ZX20230278), 云南省教育厅科学研究基金项目(No. 2025Y1050), 国家自然科学基金(No. 22065019), 昆明学院科学研究基金(No. XPZJ2205, No. XPZJ2205-2), 昆明“春城计划”青年拔尖人才(No. C202014001), 云南省中青年学术技术带头人储备人才项目(No. 202105AC160043)资助项目.

A bifunctional triphenylamine-based fluorescent dye for anti-counterfeiting and latent fingerprint detection

Chen Chunlin, Tan Jie, Zhang Bangcui, Dong Guanchen, Yang Yanhua*, Li Xiangguang*, Gao Shulin*   

  1. Yunnan Key Laboratory of Metal-Organic Molecular Materials and Device, School of Chemistry and Chemical Engineering, Kunming University, Kunming 650214
  • Received:2025-10-18 Revised:2025-11-03
  • Contact: *E-mail: yh_yangkmu@126.com; lixiangguang@iccas.ac.cn; 778144294@qq.com
  • About author:Chen and Tan contributed equally to this article
  • Supported by:
    Project supported by the National College Students’ Platform for Innovation and Entrepreneurship Training Program (No. 202411393015), the Yunnan Province “Xingdian Talent Supporting Plan” Youth Talent Special Project (No. ZX20230278), the Scientific Research Funds Project of Yunnan Education Department (No. 2025Y1050), the National Natural Science Foundation of China (No. 22065019), the Scientific Research Funds of Kunming University (No. XPZJ2205, No. XPZJ2205-2), the Kunming “Spring City Program” for Youth Top-Notch Talents (No. C202014001), the Program for Young and Middle-aged Academic and Technical Leaders Reserve Talents of Yunnan Province (202105AC160043).

为了探索多功能荧光染料的应用, 设计并成功合成了一种具有电子供体-受体分子构象的三苯胺基二氟硼化合物. 研究发现, 它不仅具有分子内电荷转移特性和溶致变色, 而且表现出聚集诱导发射性能. 这些光物理性质可以通过理论计算结果很好地解释. 此外, 粉末X射线衍射分析证实, 它表现出可逆的力致荧光变色行为, 这源于晶态和非晶态之间的相变. 利用这种荧光变色行为机制, 制备的安全纸具有防伪特性, 展示了可重复重写的无墨书写能力. 由DMSO/H2O混合物(含水量为60%, c=1×10-5mol/L)制备的显影剂可以在无孔和多孔基材上显示潜在的指纹. 进一步的分析表明, 它可以从成像照片中检测出含有汗孔的指纹的脊细节, 这可以应用于个人身份识别. 潜指纹成像起源于汗液中的油酸与染料之间的相互作用.

关键词: 二氟硼荧光染料, 力致荧光变色, 聚集诱导发射, 防伪, 潜指纹检测

To explore the application of multifunctional fluorescent dye, a triphenylamine-based difluoroboron compound with an electron donor-acceptor molecular conformation was designed and successfully synthesized. It is found that it not only has the intramolecular charge transfer characteristics and solvatochromism, but also exhibits aggregation-induced emission performance. These photophysical properties can be well explained by theoretical calculation results. Furthermore, it displays reversible mechanofluorochromism behavior, which originates from phase transition between crystalline and amorphous states, confirmed by powder X-ray diffraction analysis. Leveraging this mechanofluorochromism behavior, the prepared safety paper exhibits anti-counterfeiting characteristics, demonstrating a repeatedly rewritable ink-free writing capability. A developer prepared from a DMSO/H2O mixture (water content of 60%, c = 1 × 10-5 mol/L) could visualize latent fingerprint on both non-porous and porous substrates. Further analysis revealed that it could detect the ridge details of fingerprint containing sweat pore from photographs of imaging, which could be applied to personal identification. And latent fingerprint imaging originates from interaction between oleic acid in sweat secretions and dye.

Key words: difluoroboron fluorescent dye, mechanofluorochromism, aggregation-induced emission, anti-counterfeiting, latent fingerprint detection