Department of Studies and Research in Chemistry, Kuvempu University, P.G. Centre, Kadur, India.
Energy Materials Research Laboratory, Department of Chemistry, Siddaganga Institute of Technology, Tumakuru, India.
Luminescence. 2021 Jun;36(4):1013-1023. doi: 10.1002/bio.4027. Epub 2021 Mar 24.
The marked rise in criminal activity in society has made a difficult task for forensic scientists who aim to track any crime scene effectively, therefore visualization of latent fingerprints (LFPs) plays an increasingly vital role in forensics. In the present report, a highly sensitive solvatochromism, aggregation-induced emission-based 2-(4-nitrophenyl)-3H-benzocoumarin fluorescent dye (CFD) was fabricated using an ultrasonication protocol. The fluorescence properties of the CFD were analyzed using fluorescence spectrophotometer. The CFD produced a greenish yellow emission in solid and fluid states. An in-depth visualization of LFPs showed detailed ridge patterns under normal and ultraviolet light sources (254 and 365 nm) due to the excellent chemisorption of CFD onto the ridge patterns on the finger. All three types of ridge details were visualized without any background interference when using a simple and quick powder dusting method. Results revealed that, the present fluorescent dye can be used successfully for detection of latent fingerprints (LFPs) on various nonporous substrates surfaces, in organic light-emitting diodes applications (OLEDs), and for electrochemical sensing.
犯罪活动在社会中的明显上升，使得旨在有效追踪任何犯罪现场的法庭科学家的任务变得更加困难，因此，潜伏指纹（LFPs）的可视化在法庭科学中起着越来越重要的作用。在本报告中，使用超声处理方案制备了一种高灵敏度的溶剂变色、聚集诱导发射基于 2-(4-硝基苯基)-3H-苯并[C]香豆素的荧光染料（CFD）。使用荧光分光光度计分析了 CFD 的荧光特性。CFD 在固态和液态下均发出绿黄色发射光。深入观察 LFPs 显示，由于 CFD 对指纹上的脊图案有极好的化学吸附作用，因此在正常和紫外光源（254 和 365nm）下可以清晰地显示出详细的脊图案。使用简单快速的粉末撒粉法，在没有任何背景干扰的情况下，可以观察到所有三种类型的脊纹细节。结果表明，本荧光染料可成功用于检测各种非多孔基底表面上的潜伏指纹（LFPs）、有机发光二极管（OLEDs）应用以及电化学传感。
