LUMINESCENT COMPLEX OF LANTHANID AND PRODUCT AND INK, CONTAINING SUCH LUMINESCENT COMPLEX Russian patent published in 2017 - IPC B41M3/14 

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.

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