LUMINESCENT COMPLEX OF LANTHANID AND PRODUCT AND INK, CONTAINING SUCH LUMINESCENT COMPLEX

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FIELD : chemistry. SUBSTANCE : lanthanid luminescent complex and ink, containing such complex, as well as the method of its manufacture and the product, including such complex, are proposed. The complex has the formula : , where M is selected from the cations of alkali metals Li+, Na+, K+, Rb+ and Cs+ and its mixtures and it is present to compensate the complex charge; where Ln is selected from the cations of the trivalent rare-earth elements Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb and mixtures thereof; where R is C5-C6 heteroaryl; where Y is the optionally substituted C3-C8 heterocycloalkyl fragment bound to R with N atom; where n is the integer equal to 3 or 5; and where x is the integer equal to 0 or 1. EFFECT : effective level of the protective element identification with the certain difficult-to-reproduce luminescence spectrum. 43 cl