Method for authentication of an item
First Claim
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1. A method to authenticate an item comprising:
- combining a detectable amount of a chelated compound with the item;
circulating the item; and
thereafter irradiating the item with an electromagnetic source and observing a respon detect the presence of the chelated compound and thereby authenticate the item;
wherein the chelated compound is the result of the combination of a lanthanide metal compound with a macrocycle compound wherein the macrocycle is represented by the formulae;
wherein R is hydrogen, C1 to C4 alkyl, or a —
CH CF3 group, R2 is NO2, NH2, isothioc semicarbazido, thiosemicarbazido, maleimido bromoacetamido, or a carboxy group, M is a lanthanide metal, N is nitrogen, and each R3, R4 and R5 group may independently be hyd group comprising 1 to 100 carbon atoms, a heteroatom containing group, a C1 to C100 al group, ester, an aromatic ring (substituted or unsubstituted), or a group forming a pyridine with the nitrogen or an acid, wherein the macrocycle comprises at least one pyridine moiety
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Abstract
This invention relates to a method to authenticate an item comprising:combining a chelated compound with the item and thereafter detecting the presence of the chelated compound, wherein the chelated compound is present at 10 ppb to 5000 ppm and is the result of the combination of a lanthanide metal halide compound with a macrocycle compound comprising at least one pyridine moiety.
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Citations
24 Claims
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1. A method to authenticate an item comprising:
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combining a detectable amount of a chelated compound with the item;
circulating the item; and
thereafter irradiating the item with an electromagnetic source and observing a respon detect the presence of the chelated compound and thereby authenticate the item;
wherein the chelated compound is the result of the combination of a lanthanide metal compound with a macrocycle compound wherein the macrocycle is represented by the formulae;
wherein R is hydrogen, C1 to C4 alkyl, or a —
CH CF3 group, R2 is NO2, NH2, isothioc semicarbazido, thiosemicarbazido, maleimido bromoacetamido, or a carboxy group, M is a lanthanide metal, N is nitrogen, and each R3, R4 and R5 group may independently be hyd group comprising 1 to 100 carbon atoms, a heteroatom containing group, a C1 to C100 al group, ester, an aromatic ring (substituted or unsubstituted), or a group forming a pyridine with the nitrogen or an acid, wherein the macrocycle comprises at least one pyridine moiety - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification