聚集诱导发光材料负载蒙脱土显现潜指纹技术研究

Research on the Latent Fingerprint Technology of Aggregation Induced Luminescent Materials Loaded with Montmorillonite

摘要

指纹的法医鉴定广泛应用于罪犯身份识别，并已成为法庭证据的基础。因此，潜指纹的高效可视化对于刑事侦查活动有着十分重要的意义。论文尝试以具有聚集诱导发光（AIE）性质的查尔酮衍生物（NIR-LP）为基础，与蒙脱土以一定的比例混合进行有机改性，制备合成查尔酮衍生物@蒙脱土荧光粉末。论文对染料NIR-LP的光学性质进行的研究，并考察染料NIR-LP@蒙脱土荧光粉末对相同手指在不同客体上的潜指纹显现效果，实验结果显示刷显后的指纹纹线清晰连贯且更为稳定。因此，该混合荧光粉末有在潜指纹显现领域里得到应用的潜力，在刑事侦查活动中有着较好的前景。

Abstract

The forensic identification of fingerprints is widely used in criminal identification and has become the basis of evidence in court. Therefore, the efficient visualization of latent fingerprint is of great significance to the criminal investigation. This paper attempts to synthesize Chalcone derivatives @montmorillonite fluorescent powders based on the aggregation-induced emission (AIE) properties of Chalcone derivatives (NIR-LP), mixed with montmorillonite in a certain proportion for organic modification. The optical properties of dye NIR-LP was measured, and then the dye NIR-LP@montmorillonite fluorescence powder were used to brush the latent fingerprints of the same fingers on different objects, in order to investigate the developing effect of the powder. The experimental results showed that the fingerprint lines after brushing were clear, coherent and more stable. Therefore, the application of chalcone derivative @montmorillonite fluorescence powder in latent fingerprint scanning has a good prospect in criminal investigation.

关键词

聚集诱导发光 / 查尔酮衍生物 / 蒙脱土 / 潜指纹刷显

Key words

aggregation-induced emission / chalcone derivative / montmorillonite / latent fingerprint brush display

参考文献

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[4] He X, Bi H, Wei P. Luminescent organic molecular frameworks from tetraphenylethylene-based building blocks[J]. Journal of Materials Chemistry C, 2023, 11(11):3675-3691.

[5] 杜宪超, 邢小静, 程新峰, 等. 聚集诱导发光分子在公共安全领域中的应用[J]. 分析试验室, 2022, 41(4):487-496.

基金资助

江苏省大学生实践创新创业训练计划项目(202210329044Y)

江苏警官学院法庭科学先进材料开发应用科研创新团队(2021BK01)