Multicomponent one-pot synthesis of 2-amino-6-(2-oxo-2H-chromen-3-yl)-4-(1,3-diphenyl-1H-pyrazol-4-yl)pyridine-3-carbonitriles and their photophysical, solvatochromic, DFT, TD-DFT studies, latent fingerprints, hydrogels and data encryption applications

Abstract

A novel series of 2-amino-6-(2-oxo-2H-chromen-3-yl)-4-(1,3-diphenyl-1H-pyrazol-4-yl)pyridine-3-carbonitriles (4i-w) were synthesised employing a simple and efficient multicomponent one-pot synthesis. Since the compounds exhibit visible fluorescence and strong solubility in organic solvents, their optical and solvatochromic properties have been thoroughly examined via UV–Vis absorption and fluorescence spectroscopy, including density functional theory (DFT) and time-dependent density functional theory (TD-DFT). An in-depth investigation of the anti-counterfeiting (AC) application of latent fingerprints (LFPs) found that the ridges had many indestructible and unique pores. To attain superior safety and efficiency, highly effective anticounterfeiting techniques have been assembled. The ability to detect sweat pores opens up novel forensic investigation possibilities. FTs (fingerprint tags) recognised LFPs that were incredibly effective, sensitive, selective, and low in toxicity. The outcomes can be used for secure encoding, personal identification, photoluminescent hydrogel, and studying LFPs on various surfaces under UV 365 nm light.