Sensing and sensitive visualization of latent fingerprints on various surfaces using a versatile fluorescent aggregation‐induced emission‐based coumarin derivative. (24th March 2021)

• Record Type: Journal Article
• Authors: Kumar, Naveen; Udayabhanu, ; Ali Alghamdi, Abdulaziz; Basavaraj, R.B.; Mahadevan, K.M.; Nagaraju, G.
• Is Part Of: Luminescence. Volume 36:Number 4(2021)
• Page Start: 1013
• Page End: 1023
• Publication Date: 2021-03-24
• Subjects: AIE -- coumarin fluorescent dye -- LFPs and electrochemical sensing -- photoluminescence -- solvatochromism; Luminescence -- Periodicals; Bioluminescence -- Periodicals; Chemiluminescence -- Periodicals; Luminescence -- Periodicals; 535.35
• DOI: 10.1002/bio.4027
• Languages: English
• ISSNs: 1522-7235

Abstract

Abstract: 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. Abstract : A simple, quick method involving ultrasound waves was used to synthesize a highly sensitive coumarin fluorescent dye. The fluorescent dye emitted an excellent greenish yellow colour under aggregation‐induced emission, solid and fluid state. A simple, nondestructive powder dusting method was used to visualize latent finger prints that showed high sensitivity, reproducibility, selectivity, and reliability. The coumarin fluorescent dye exhibited high electrochemical sensing of nitrite up to a detection level of 0.88 × 10 −6 M.