Abstract: A method of optical marking of products by either applying a composition including at least one lanthanide complex and a vehicle on at least part of a surface or a product, or incorporating a composition including at least one lanthanide complex and a vehicle into at least part of a product. The lanthanide complex is according to Formula I: [Ln(L)3]3?.

Abstract: A process which allows separation of americium present in an acid aqueous phase or in an organic phase from the other metal elements also found in this phase, by complexation of the americium with a water-soluble ethylenediamine derivative; and a process for selective recovery of americium from an acid aqueous phase containing, in addition to americium, other metal elements, which comprises the application of this separation process.

Abstract: The invention relates to the use of compounds comprising at least one 2-(1H-tetrazol-5-yl)pyridine unit, of formula (I) below: as ligands for lanthanides and, more especially, as organic chromophores for complexing these elements. It also relates to lanthanide complexes using these compounds as complexing organic chromophores, and to new compounds containing one or more 2-(1H-tetrazol-5-yl)pyridine units, which are useful as ligands for lanthanides and, in particular, as organic chromophores for complexing these elements. Applications: photonics and optoelectronics, especially for forming light-emitting devices such as electroluminescent diodes; biology, as for example for the preparation of luminescent probes.

Abstract: At least one lanthanide complex for optical marking of products, compositions for optical marking of products, and an optical marking method including an application step of these compositions.

Abstract: A process which allows separation of americium present in an acid aqueous phase or in an organic phase from the other metal elements also found in this phase, by complexation of the americium with a water-soluble ethylenediamine derivative; and a process for selective recovery of americium from an acid aqueous phase containing, in addition to americium, other metal elements, which comprises the application of this separation process.

Abstract: The invention concerns a transition metal coordination complex of general formula (I) {[M(X)]C(H2O)n}p wherein: M represents an element belonging to the lanthanide group; and L represents a decadentate chromophore ligand of general formula (II). R1, R2, R3 and R4 independently represent hydrogen or an alkyl or aryl radical. A1, A2, A3 and A4 independently represent a structure of general formula (III). U1, U2 and U3 independently represent C or N, and R5, R6 and R7 independently represent hydrogen, an alkyl or aryl radical. Y represents C, O, S, P or N, and m is an integer representing free valences of Y. R8 represents independently hydrogen, an alkyl or aryl radical. X represents a counter-ion, and n represents hydrating water molecules. p represents monomers. H2O represents the hydrating water molecules. The invention also concerns a method for preparing such a ligand by reaction between a 6-chloromethylpyridine-2-carboxylate ethyl ester and ethylenediamine in organic medium.

Abstract: The present invention relates to a silica particle comprising at least one complex of at least one lanthanide and of at least one ligand of formula (A) in which Z1, Z2 and Z3, which may be identical or different, each represent a group bearing an atom bearing a lone pair and/or a negative charge; R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11 and R12, which may be identical or different, each represent a hydrogen, an optionally substituted alkyl radical, an optionally substituted aryl radical, a halogen, a group —OR13 or a group —SR13, with R13 representing H, an optionally substituted alkyl group or an optionally substituted aryl group.

Abstract: The invention relates to the use of compounds comprising at least one 2-(1H-tetrazol-5-yl)pyridine unit, of formula (I) below: as ligands for lanthanides and, more especially, as organic chromophores for complexing these elements. It also relates to lanthanide complexes using these compounds as complexing organic chromophores, and to new compounds containing one or more 2-(1H-tetrazol-5-yl)pyridine units, which are useful as ligands for lanthanides and, in particular, as organic chromophores for complexing these elements. Applications: photonics and optoelectronics, especially for forming light-emitting devices such as electroluminescent diodes; biology, as for example for the preparation of luminescent probes.

Abstract: The present invention relates to a ligand for metals, in particular lanthanides, of the general formula (I) A corresponds to an organic acid radical, to an alkyl or aryl ester. R1 and R2 correspond, individually and independently of one another, to an H, an alkyl radical or an aryl radical. Z1 and Z2, identical or different, are of the general formula (ZA) or (ZB): G represents an O, N, P, S or a C substituted independently with an H, an alkyl radical or an aryl radical. R3 to R8 correspond, individually and independently of one another, to an H, an alkyl radical or an aryl radical. The present invention also relates to co-ordinating complexes of the general formula: [Ln(L)(H2O)n] wherein Ln is a lanthanide, L corresponds to a ligand, as well as the grafting thereof to a molecule of interest and their preparation method. The present invention relates moreover to a contrast agent and a pharmaceutical composition including at least one ligand and/or complex and/or molecule of interest.

Abstract: The present invention relates to a silica particle comprising at least one complex of at least one lanthanide and of at least one ligand of formula (A) in which Z1, Z2 and Z3, which may be identical or different, each represent a group bearing an atom bearing a lone pair and/or a negative charge; R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11 and R12, which may be identical or different, each represent a hydrogen, an optionally substituted alkyl radical, an optionally substituted aryl radical, a halogen, a group —OR13 or a group —SR13, with R13 representing H, an optionally substituted alkyl group or an optionally substituted aryl group.

Abstract: The invention concerns a transition metal coordination complex of general formula (I) {[M(X)]C(H2O)n}p wherein: M represents an element belonging to the lanthanide group; and L represents a decadentate chromophore ligand of general formula (II). R1, R2, R3 and R4 independently represent hydrogen or an alkyl or aryl radical. A1, A2, A3 and A4 independently represent a structure of general formula (III). U1, U2 and U3 independently represent C or N, and R5, R6 and R7 independently represent hydrogen, an alkyl or aryl radical. Y represents C, O, S, P or N, and m is an integer representing free valences of Y. R8 represents independently hydrogen, an alkyl or aryl radical. X represents a counter-ion, and n represents hydrating water molecules. p represents monomers. H2O represents the hydrating water molecules. The invention also concerns a method for preparing such a ligand.