Synthesis, spectroscopic and photoluminescence studies of novel Eu3+ nanophosphor complex as fluorescent sensor for highly sensitive detection of latent fingerprints and anti-counterfeiting

摘要

Great attention has been paid to synthesize novel luminescent hybrid Eu(Thiol)Phen Nanophosphor complex; where (Thiol) = (E)-2-hydroxy-N/-((thiophen-2-yl)methylene)benzohydrazide and (Phen) = 1,10-phenanthroline as co-ligand. Properties like structure, morphology and optical characters were investigated. The results revealed that binary ligand acts as monoanionic tridentate through N-atom, O-atom and S-atom as donor sites. The secondary ligand (Phen) acting as bidentate through two (C=N)(pyridine) groups. TEM image of ternary hybrid Eu(Thiol)Phen phosphor complex was cleared aggregated hybrid morphologies between sheet and rode shapes and their crystal sizes were in nano-domain. A pure red emission of Eu3+ Nanophosphor complex with long lifetime value was obtained, under harmless UVA, UVB and UVC. Optimized photoluminescence (PL) of Nanophosphor complex effectively developed as a novel sensing material for the visualization of latent fingerprints (LFPs) from various forensic relevant materials, including non-porous and porous of multi-color surfaces as well as security ink applications. (c) 2020 Elsevier B.V. All rights reserved.