Anthracene-thiophene hybrid: a versatile fluorophore for advanced forensic and printing applications

Smart functional fluorophores that own unique optical features are always of high demand for forensic science and printing applications. A new anthracene-thiophene hybrid (ATH) with UV/blue light induced fluorescence and good photostability is prepared through an easy, one-step synthetic protocol. ATH is found to be highly effective for detection of latent fingerprints on porous, nonporous, and semi-porous surfaces, ensuring its versatility for superior visualization of distinct level 1-3 fingermark patterns under UV illumination. Further ATH displayed remarkable efficiency in the visualization and analysis of lip print patterns under daylight, offering a user-friendly approach to forensic evidence collection without the need for any specialized lighting equipment. Furthermore, ATH is used as a key colorant to formulate a vegetable oil-based environment-friendly offset ink to obtain the prints on UV dull paper substrates. The printed proof displayed resistance to mechanical abrasion, and photobleaching. Moreover, the inked area fluoresces when subjected to UV radiation, which could be used in various industries and applications where high visibility, aesthetic appeal, or safety is required. Overall, ATH is attractive due to its multifunctionality, ease of synthesis, broad forensic applicability, and enhanced printing potential, making it a valuable advancement in forensic science and pigment technologies.