| 简介 |
The invention relates to a method for labelling at least one material comprising an organic or inorganic, solid or liquid matrix, comprising at least one step consisting in incorporating therein, during the manufacturing thereof, at least one compound based on at least one luminescent rare earth element according to a concentration which makes this compound detectable under UV irradiation in said material. According to the invention, said compound comprises at least one hexanuclear complex corresponding to formula (I) : [Ln(1)Ln(2)Ln(3)Ln(4)Ln(5)Ln(6)μ6-O(OH)8(NO3)n1(H2O)n2]2+ in which : the Ln(i) are identical or different rare earth ions chosen from the group consisting of the ions of Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y; n1 is an integer between 0 and 6; and n2 is an integer between 0 and 14. |
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