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<p>Highly efficient fingerprint imaging agents are essential in forensic investigation. Simple, affordable dusting is the most widely used method, and different powders help to overcome disadvantages like low contrast, high background interference, and toxicity. We studied the utilization of an aggregation-induced emission luminogen (AIEgen) to produce a fluorescent powder for latent fingerprint development. Three tetraphenylethene (TPE) derivatives with different hydrophobic substitutions, namely TPE-Br (1), TPE-C4Br (2), and TPE-C3OH (3), were synthesized, combined with fine silica gel, and applied for latent fingerprint visualization. An AIE fingerprint powder coated with TPE-C4Br (2P) proved the best of the three and showed the ability to develop latent fingerprints on various substrates. Fingerprint details could be observed with high contrast and resolution up to the secondary level of information.</p> Graphical abstract

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Fluorescent powder for latent fingerprints imaging based on tetraphenylethene derivatives

  • 期刊论文

  • 发表日期：

    2025年7月30日

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  • Klatnatee Vepulanont,
  • Sukanda Mattayan,
  • Kanokwan Ganjanavijit,
  • Supachai Phanglai,
  • Tawat Chanadee,
  • Dhassida Sooksawat

摘要

Highly efficient fingerprint imaging agents are essential in forensic investigation. Simple, affordable dusting is the most widely used method, and different powders help to overcome disadvantages like low contrast, high background interference, and toxicity. We studied the utilization of an aggregation-induced emission luminogen (AIEgen) to produce a fluorescent powder for latent fingerprint development. Three tetraphenylethene (TPE) derivatives with different hydrophobic substitutions, namely TPE-Br (1), TPE-C4Br (2), and TPE-C3OH (3), were synthesized, combined with fine silica gel, and applied for latent fingerprint visualization. An AIE fingerprint powder coated with TPE-C4Br (2P) proved the best of the three and showed the ability to develop latent fingerprints on various substrates. Fingerprint details could be observed with high contrast and resolution up to the secondary level of information.

Graphical abstract