Commissariat a L'energie Atomique

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Areva Nc

Marinella Mazzanti

Olivier Raccurt

Daniel Imbert

Marc Lemaire

Gilles Bernier

Xavier Heres

Renaud Demadrille

Fabien Burdet

Jorice Samuel

Alain Favre-Reguillon

Marion Giraud

Julien Borrini

Eugen Andreiadis

Nicolas Wartenberg

Eugen Sorin Andreiadis

Christelle Gateau

Aline Nonat

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)].(Cat), wherein: Ln is a lanthanide, Cat is a cation and L is a ligand of formula II: 

Use of lanthanide complexes for optical marking of products

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.

Process for separating americium from other metallic elements present in an acidic aqueous or organic phase

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.

Compounds useful as ligands and particularly as organic chromophores for complexing lanthanides and applications thereof

The invention concerns a transition metal coordination complex of general formula (I) {[M(X)]C(HO)}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. HO 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.

Method for obtaining highly luminescent lanthanide complexes

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) 

Silica particle comprising an organolanthanide compound, preparation process therefor and uses thereof

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Saint Martin le Vinoux, France

Marinella Mazzanti