2021
DOI: 10.21577/0103-5053.20210010
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Synthesis, Characterization, and Application of Europium(III) Complexes as Luminescent Markers of Banknotes

Abstract: In this work, three complexes were synthesized from the trivalent europium ion (EuIII), using the picrate anion (pic), and delta-valerolactam (DVL), epsilon-caprolactam (EPK), and oenantholactam (OEN). The synthesized complexes [Eu(pic)3∙(DVL)3], [Eu(pic)3∙(EPK)3], and [Eu(pic)3∙(OEN)3] were studied as luminescent markers for application as security elements in Brazilian banknotes. All complexes showed red color emission with absorption at 397 nm and emission at 614 nm. Qualitative luminescence tests were perf… Show more

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