Centre National De La Recherche Scientifique

Université Claude Bernard Lyon I

Universite Claude Bernard – Lyon1

Foi Swedish Defence Research Agency

Cédric Desroches

Stéphane Parola

Frédéric Chaput

Jean Bouix

Roger Jp Lamartine

Denis Chateau

Francis Vocanson

César Lopes

The present invention relates to a method for preparing nanoparticles at least partially consisting of rare earth fluoride, characterized in that said fluoride is produced, in a solution, from a salt of the corresponding rare earth element and from a charge-transfer complex of formula (I), where Ra, Rb, and Rc are as defined in claim

Method for preparing rare earth fluoride nanoparticles

The invention concerns a preparation process of a hybrid organic-inorganic material including the following successive steps:

Hybrid organic-inorganic material constituted by a silica network having photochromic agents and optical power limiting agents as a doping agent in the material

The object of the invention is new complexes of derivatives of thiacalix[4]arenes having the formula:R, R, R, R, R, R, Ret Rare such as defined in claim 1 and their utilization, especially for manufacturing of materials having optical limiter properties.

Metallic thiacalix[4]arene complexes

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Lyons, France

Cédric Desroches