Centre National De La Recherche Scientifique

Université Paris-Sud 11

UniversitÉ De Versailles—saint-Quentin-En-Yvelines

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

Université Paris—sud

Université Paris Sud Xi

Université Versailles Saint-Quentin-En-Yvelines

Universite De Paris 11 - Paris Sud

Centre National De La Recherche Scientifique-cnrs

Ruxandra Gref

Patrick Couvreur

Christian Serre

Patricia Horcajada-Cortes

Gérard Ferey

Catherine Amiel

Thomas Berthelot

Didier Desmaele

Bernard Sebille

Fatima Zouhiri

Laszlo Jicsinszky

Patricia Horcajada Cortes

Violeta Rodriguez-Ruiz

Milo Malanga

Valentina Agostoni

Anca-Lucia Laza-Knoerr

Elena Bellido Vera

Samia Daoud-Mahammed

The invention relates to nanoparticles made from organometallic hybrid materials made from iron carboxylates, used for example as contrast agents. The particles can also be used for the encapsulation and vectoring of molecules of interest such as active pharmaceutical agents, cosmetically interesting compounds and markers. Apart from the intrinsic properties thereof for imaging, said nanoparticles give good results in terms of capacity of loading with medicaments and in biocompatibility.

Organic/inorganic hybrid nanoparticulates made from iron carboxylates

A process for preparing a porous solid with an outer surface modified by at least one polymer; the polymer being simultaneously synthetized in solution and grafted on the outer surface of the solid, includes contacting:

Porous solid with outer surface grafted with a polymer

The present invention concerns metal-organic hybrid solids having a modified outer surface. These solids can be used, for example, for the storage and vectoring of molecules of interest such as pharmaceutically active ingredients, compounds of interest in cosmetics and markers, for example contrast agents. These solids have good results in terms of active drug loading capacities, biocompatibility, stability and controlling the release of the active ingredients encapsulated.

Organic-inorganic hybrid solid having a modified outer surface

The invention relates to nanoparticles made from organometallic hybrid materials made from iron carboxylates, used for example as contrast agents. The particles can also be used for the encapsulation and vectoring of molecules of interest such as active3 pharmaceutical agents, cosmetically interesting compounds and markers. Apart from the intrinsic properties thereof for imaging, said nanoparticles give good results in terms of capacity for loading with medicaments and in biocompatibility.

A complex formed of at least one molecule of 5-(1,2-dihydroxy-ethyl)-3,4-dihydroxy-5H-furan-2-one or a derivative covalently bonded with at least one hydrocarbon radical with formula (A) as follows: wherein: &#x2022;-m 1=1, 2, 3, 4, 5 or 6; &#x2022;-m 2=0, 1, 2, 3, 4, 5 or 6; and represents the site of the bond with the molecule of 5-(1,2-dihydroxy-ethyl)-3,4-dihydroxy-5H-furan-2-one or derivative. Formula (I) 

Vitamin C complexes

The present invention relates to a method for preparing a cyclodextrin polymer and/or a hydrophilic polymer emulsion having cyclodextrins as well as lipophilic compounds, the emulsions having a remarkable stability. In particular, the method includes: (i) adding a lipophilic compound into an aqueous solution of a cyclodextrin unit polymer or hydrophilic polymer having cyclodextrins; (ii) forming an emulsion from the mixture resulting from step (i). The invention also relates to the resulting emulsions, i.e. stabilized emulsions by a non-covalent and non-crystalline inclusion complex consisting of (i) a cyclodextrin unit polymer or a hydrophilic polymer having cyclodextrins and (ii) a lipophilic compound. The invention also relates to the use of said emulsions in the cosmetic, pharmaceutical and/or agri-food fields.

Method for forming cyclodextrin polymer and lipophilic compound emulsions, resulting emulsions, and compositions including said emulsions

A composition comprises an aqueous dispersion of particles (p) of mean hydrodynamic diameter between 50 and 5000 nm. The particles contain (A) polymers based on cyclodextrin units, comprising on average at least four cyclodextrin units within their structure; and (B) macromolecules of polysaccharides comprising groups G capable of forming inclusion complexes with the cyclodextrins present in the structure of the polymers (A), with an average number of groups G per polysaccharide macromolecule at least equal to three. The compounds (A) and (B) are water-soluble in the isolated state. A method is also provided which relates to the preparation of these compositions, as well as their use in order to achieve the encapsulation of compounds such as active substances.

Aqueous dispersions of nanometric or micrometric particles for encapsulating chemical compounds

Growing community of inventors

Verrières-le-Buisson, France

Ruxandra Gref