期刊
FRONTIERS IN CHEMISTRY
卷 10, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fchem.2022.943925
关键词
latent fingerprints (LFP); fluorescent imaging; dicyanomethylene-4H-pyran (DCM); D-pi-A structure; fluorescence enhancement
资金
- National Key R&D Program of China [2021ZD0201004]
- National Natural Science Foundation of China [22165008, 22077037]
- Hainan Provincial Natural Science Foundation of China [521RC506]
- Open Project Program of Wuhan National Laboratory for Optoelectronics [2020WNLOKF018]
This study successfully designed and synthesized a low-cost and high-contrast fluorescent latent fingerprint developer, and obtained clear and high-contrast fingerprint patterns on different substrates using the dusting method.
The efficient development of latent fingerprint (LFP) is attractively important for criminal investigation. The low-cost and high-contrast developer is still a challenge. In this study, we designed and synthesized dicyanomethylene-4H-pyran (DCM) derivatives PZ-DCM and Boc-PZ-DCM by introducing of large steric hindrance group Boc, the solid-state fluorescence of DCM derivatives was greatly enhanced. The low-cost fluorescent LFP developers were prepared by blending with different proportion of montmorillonite (MMT). As a result, clear and high contrast fingerprint patterns were obtained with dusting method by the developer with 3% content of Boc-PZ-DCM. Furthermore, we employed the developer with 3% content of Boc-PZ-DCM to develop the sweat latent fingerprints on different substrates by powder dusting, and collected clear fingerprint patterns, indicating that the developer is universal. In a word, the Boc-PZ-DCM/MMT powder is a promising candidate for LFP developer.
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