FIELD: biochemistry.
SUBSTANCE: invention relates to a fiduciary composition. Composition comprises a liquid or paste-like printing matrix, preferably colourless, and a reversible mechanoluminescent compound of formula A
,
where Ar – a monosubstituted polycyclic aromatic hydrocarbon, formed as a result of the fusion of 4 benzene cycles; n1 ranges from 0 to 10, n2 – from 0 to 10, wherein n1 and n2 are not equal to 0 at the same time; Y is cyano, formyl, ester. Compounds of formula A have various reversible mechanoluminescent properties, in particular, reversible mechanofluorochromism.
EFFECT: disclosed composition improves document security.
25 cl, 18 dwg, 1 ex
