应用化学 ›› 2026, Vol. 43 ›› Issue (1): 67-76.DOI: 10.19894/j.issn.1000-0518.250190

• 研究论文 • 上一篇    下一篇

吡啶基智能荧光分子探针及其在指纹成像和光打印中的应用

曾聪1,2,3, 胡佳龙1,2,3, 冯诗语1,2,3(), 黄伟国1,2,3()   

  1. 1.福州大学化学学院,福州 350108
    2.中国科学院福建物质结构研究所,结构化学全国重点实验室,福州 350002
    3.中国科学院大学福建学院,福州 350002
  • 收稿日期:2025-05-09 接受日期:2025-09-30 出版日期:2026-01-01 发布日期:2026-01-26
  • 通讯作者: 冯诗语,黄伟国
  • 基金资助:
    福建省自然科学基金(2024J09055)

Pyridine-Induced Multifunctional Fluorescent Probes for Latent Fingerprint Imaging and Photoprinting Applications

Cong ZENG1,2,3, Jia-Long HU1,2,3, Shi-Yu FENG1,2,3(), Wei-Guo HUANG1,2,3()   

  1. 1.College of Chemistry,Fuzhou University,Fuzhou 350108,China
    2.State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China
    3.Fujian College,University of Chinese Academy of Sciences,Fuzhou 350002,China
  • Received:2025-05-09 Accepted:2025-09-30 Published:2026-01-01 Online:2026-01-26
  • Contact: Shi-Yu FENG,Wei-Guo HUANG
  • About author:whuang@fjirsm.ac.cn
    fengshiyu@fjirsm.ac.cn
  • Supported by:
    the Natural Science Foundation of Fujian Province(2024J09055)

摘要:

合成了一种基于吡啶杂环、具有D-π-A结构的荧光探针NN-二苯基-4-(吡啶-4-基)苯胺(TPA-Py)及其两亲性衍生物4-(4-(二苯氨基)苯基)-1-(2-羟乙基)吡啶-1-鎓溴化物(TPA-PyBr),系统地研究了其光物理特性。 研究结果表明,TPA-Py具有显著的酸致变色特性,在吡啶基团质子化过程中其荧光发射峰从415 nm红移至550 nm。 TPA-Py还能够响应聚合物微环境的变化: 随着聚丙烯酸五氟苯酚酯(pPFPA)浓度的增加,其荧光发射光谱红移超过160 nm。 TPA-Py通过2-溴乙醇修饰得到TPA-PyBr,其水溶性显著提升,并展现出聚集诱导发光(AIE)效应。 利用该特性,TPA-PyBr在纯水体系中通过疏水相互作用靶向指纹脂质微区,实现了高对比度的指纹荧光成像,克服了传统探针依赖有机溶剂所导致的生物检材损伤问题。 此外,TPA-Py掺杂的聚甲基丙烯酸甲酯(PMMA)薄膜,实现了高亮度的光激活长余辉发光,展示了可擦写光打印的功能 。本工作通过分子工程策略,实现了吡啶基荧光探针在酸响应传感、微环境监测、生物识别及光打印等领域的多功能集成,为开发智能响应型光电材料提供了借鉴。

关键词: 酸致变色, 微环境监测, 室温磷光, 聚集诱导发光, 指纹显影

Abstract:

A pyridine-containing heterocyclic fluorescent probe, NN-diphenyl-4-(pyridin-4-yl)aniline (TPA-Py), with a D-π-A architecture, along with its amphiphilic derivative 1-(2-Hydroxyethgl)-4-[4-(diphenylamine)phenyl]pyridin-1-ium (TPA-PyBr), was synthesized, and their photophysical properties were systematically investigated. The experimental results demonstrated that TPA-Py exhibits pronounced acidochromic behavior, with its fluorescence emission peaks shifting from 415 nm to 550 nm upon protonation of the pyridyl group. Furthermore, TPA-Py exhibits fluorescence color changes in response to polar matrices, showing a remarkable bathochromic shift of over 160 nm as the concentration of poly(pentafluorophenyl acrylate) (pPFPA) increases. Compared with TPA-Py, TPA-PyBr exhibits improved aqueous solubility and aggregation-induced emission (AIE) behavior. This enables TPA-PyBr to achieve high-contrast fluorescent imaging of latent fingerprints in purely aqueous media by selectively targeting lipid-rich microdomains through hydrophobic interactions, thereby overcoming issues of biological sample degradation caused by organic solvent dependency in conventional probes. In addition, the TPA-Py-doped poly(methyl methacrylate) (PMMA) film achieves photoactivable room-temperature phosphorescence, showcasing its capability for erasable optical printing. This work explores the multifunctional capabilities of pyridine-based fluorescent probes in applications such as acid-responsive sensing, microenvironment monitoring, fingerprint visualization, and optical printing, providing valuable insights for the development of intelligent, responsive optoelectronic materials.

Key words: Acidochromic behavior, Microenvironment monitoring, Room-temperature phosphorescence, Aggregation-induced emission, Fingerprint visualization

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