Commissariat a L'energie Atomique

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

Eric Pasquinet

Lionel Hairault

Pierre Montmeat

Anne Wuillaume

Didier Poullain

Roger Guilard

Franck Denat

Marc Birot

Stéphane Brandes

Jean-Pierre Lere-Porte

Françoise Serein-Spirau

Jean-Michel Barbe

Etienne Kosciusko-Morizet

Bruno Lebret

Claude Gros

Salem Wakim

Joël Moreau

Myriam Bouhadid

Thomas Caron

Christelle Barthet

Arnaud Beaucamp

Nicolas Pin

Fabrice Audouin

Hervé Deleuze

Olivier Besnard

A method for precipitating as particles 2,6-diamino-3,5-dinitropyrazine-1-oxide (or ANPZO) present in an acid medium, which comprises adding the acid medium to an aqueous solution and which is characterized in that the aqueous solution comprises a nitrate salt. Further disclosed is a method for synthesizing ANPZO implementing this precipitation method. The synthesis method comprises converting 2,6-diaminopyrazine-1-oxide (or DAPO) into ANPZO by nitration in an acid medium, and then precipitating as particles the ANPZO by adding the acid medium to an aqueous solution, and is characterized in that the aqueous solution comprises a nitrate salt.

Precipitation method and synthesis method of 2,6-diamino-3,5-dinitropyrazine-1-oxide

The invention concerns the use of cyclic azaboronates as sensitive materials in sensors for the detection of the presence of peroxides, in particular hydrogen peroxide, in a gaseous environment. It further concerns new cyclic azaboronates, as well as sensors comprising these azaboronates as sensitive materials. Applications for the invention include the following: fight against terrorism, monitoring for security purposes of sites in which peroxides or peroxidable compounds are manufactured, stored, and/or used, monitoring of atmospheric pollution, etc.

Use of cyclic azaboronates as sensitive materials in sensors for detecting the presence of peroxides in a gaseous environment

A method for synthesizing 3,5-dichloroanisole from 1,3,5-trichloro-benzene is proved. The method may comprises: a) the reaction between 1,3,5-trichloro-benzene and a methanolate of an alkaline or alkaline-earth metal in a first solvent chosen from among dimethylsulfoxide and 1,1,3,3-t&#xe9;tramethylurea, b) the precipitation of the product resulting from step a) in a second solvent which is not included among substances considered carcinogenic, mutagenic and/or toxic for reproduction by Regulation (EC) no 1272/2008 of the European Parliament and of the Council of 16 Dec. 2008, then c) the recovery of the precipitate thus obtained. The method may be applied to synthesize 1,3,5-triamino-2,4,6-trinitrobenzene in which 3,5-dichloroanisole is an intermediate product.

Method for synthesizing 3,5-dichloroanisole from 1,3,5-trichlorobenzene

The invention relates to chemical sensors comprising fluorescent conjugated polymers as sensitive materials and to their use in detecting or assaying nitro compounds, in particular nitroaromatic compounds. Fields of application: detection of explosives, monitoring and observation of atmospheric pollution and of the quality of relatively confined surroundings, watching over industrial sites.

Chemical sensors comprising fluorescent conjugated polymers as sensitive materials, and their use in the detection or assaying of nitro compounds

A chemical sensor including a substrate having at least two faces, at least one of the faces being covered by a thin film that includes a sensitive material, and a means for measuring a change in a physical property of the sensitive material; and, methods of detecting the presence of a nitro compound with the chemical sensor.

Chemical sensors comprising aniline polysiloxanes as sensitive materials and use thereof for detecting of assaying nitro compounds

The invention relates to the use of molecular tweezers as sensitive materials in chemical sensors intended to detect or assay organic compounds in the vapour state, and in particular nitro compounds. These molecular tweezers correspond to the general formula (I): in which: Fields of application: detection of explosives, control and monitoring of atmospheric pollution and of the quality of ambient air in relatively confined spaces, and monitoring of industrial sites.

Use of molecular tweezers as sensitive materials in chemical sensors for detecting or assaying organic compounds in the vapour state

The invention relates to the use of at least one polymer comprising a repeating unit of formula (I): in which: Applications: Detection of explosives, control/monitoring of atmospheric pollution and of ambient air quality, monitoring of industrial sites.

Use of siloxane-based polymers or composites in chemical sensor for detecting nitrate compounds

Growing community of inventors

Saint Avertin, France

Eric Pasquinet