Abstract: Nanoparticles that can be used as hydrosilylation and dehydrogenative silylation catalysts. The nanoparticles have at least one transition metal with an oxidation state of 0, chosen from the metals of columns 8, 9 and 10 of the periodic table, and at least one carbonyl ligand, preferably a silicide.

Abstract: Nanoparticles that can be used as hydrosilylation and dehydrogenative silylation catalysts. The nanoparticles have at least one transition metal with an oxidation state of 0, chosen from the metals of columns 8, 9 and 10 of the periodic table, and at least one carbonyl ligand, preferably a silicide.

Abstract: A method of preparing a crystalline thin film having a formula MY2 includes (1) preparing an MYx amorphous film by atomic layer deposition on a surface of a substrate, and (2) annealing the amorphous MYx film at 350° C. or more to provide the crystalline MY2 film. The amorphous MYx film is formed from at least one metal M precursor and at least one element Y precursor, wherein x is 1.5 to 3.1, M is tungsten or molybdenum, and Y is sulfur or selenium. Step (1) includes a) introducing a first metal M precursor or element Y precursor into a deposition chamber, b) purging with inert gas, c) introducing a second metal M precursor when the first precursor is element Y, or element Y precursor when the first precursor is metal M, d) purging with inert gas, e) repeating steps a) to d), and f) obtaining the amorphous MYx film.

Abstract: Nanoparticles that can be used as hydrosilylation and dehydrogenative silylation catalysts. The nanoparticles have at least one transition metal with an oxidation state of 0, chosen from the metals of columns 8, 9 and 10 of the periodic table, and at least one carbonyl ligand, preferably a silicide.

Abstract: A method of preparing a crystalline thin film having a formula MY2 includes (1) preparing an MYx amorphous film by atomic layer deposition on a surface of a substrate, and (2) annealing the amorphous MYx film at 350° C. or more to provide the crystalline MY2 film. The amorphous MYx film is formed from at least one metal M precursor and at least one element Y precursor, wherein x is 1.5 to 3.1, M is tungsten or molybdenum, and Y is sulfur or selenium. Step (1) includes a) introducing a first metal M precursor or element Y precursor into a deposition chamber, b) purging with inert gas, c) introducing a second metal M precursor when the first precursor is element Y, or element Y precursor when the first precursor is metal M, d) purging with inert gas, e) repeating steps a) to d), and f) obtaining the amorphous MYx film.

Abstract: A process for selective partial hydrogenation of conjugated diene compounds includes at least one, preferably terminal, diene function and at least one additional carbon-carbon double bond, the process including reacting the conjugated diene compounds with hydrogen in the presence of an iridium-NHC based catalyst. The disclosure also relates to a reaction mixture that can be obtained at the end of the process. The disclosure also relates to the use of the reaction mixture.

Abstract: The present invention relates to a method for manufacturing a chromatography column, in particular for a gas phase chromatography, comprising a stationary phase made from a sol. This method comprises the following steps: (a) introducing this sol at the first end of the column, (b) moving said sol towards the second end of the column, so that a sol layer is formed on the internal wall of the column, this layer being able to form a gel on said internal wall, and (c) drying of the gel. The present invention also relates to a capillary column as well as to a microcolumn which may be manufactured according to this method.

Abstract: A process for the selective partial hydrogenation of conjugated diene compounds includes at least one, preferably terminal, diene function and at least one additional carbon-carbon double bond, the process including reacting the conjugated diene compounds with hydrogen in the presence of a nickel-NHC based catalyst. The disclosure also relates to a reaction mixture that can be obtained at the end of the process and to a catalyst that can be used in the process. The disclosure also relates to the use of the reaction mixture.

Abstract: A method (P) for hydrosilylating at least one compound (C), including at least one unsaturation in the presence of an organosilicon compound (O) including at least one hydrogen atom per molecule bonded directly to a silicon atom, and of a catalytic hydrosilylation system including a structured porous material (A) including pores and an inorganic structure consisting of silicon oxide walls, in which metal nanoparticles are contained.

Abstract: The present invention relates to a method for manufacturing a chromatography column, in particular for a gas phase chromatography, comprising a stationary phase made from a sol. This method comprises the following steps: (a) introducing this sol at the first end of the column, (b) moving said sol towards the second end of the column, so that a sol layer is formed on the internal wall of the column, this layer being able to form a gel on said internal wall, and (c) drying of the gel. The present invention also relates to a capillary column as well as to a microcolumn which may be manufactured according to this method.

Abstract: A method (P) for hydrosilylating at least one compound (C), including at least one unsaturation in the presence of an organosilicon compound (O) including at least one hydrogen atom per molecule bonded directly to a silicon atom, and of a catalytic hydrosilylation system including a structured porous material (A) including pores and an inorganic structure consisting of silicon oxide walls, in which metal nanoparticles are contained.

Abstract: The present invention concerns materials consisting in a porous and structured network, this network being at least in part formed by Si atoms, or Si atoms and metal atoms, linked to each other's via siloxy bonds, the amount of radical ranging from 0.50 to 0.03 mmol of radical per gram of material, and in that the network is formed with a sol-gel step using an organosilane for the introduction of the organic molecules allowing their regular distribution within the porous structured material. The invention also concern a process for the preparation of such material and a method of analysis by Nuclear Magnetic Resonance (NMR) of an analyte wherein it uses dynamic nuclear polarization generated with a material according to the invention.

Abstract: This method relates to the preparation by ALD of a thin film of formula MYx, x being in the range from 1.5 to 3.1. According to this method, MYx is deposited by ALD on a substrate, from at least one precursor of metal M, and at least one precursor of element Y; M being tungsten and/or molybdenum; the degree of oxidation of metal M in the precursor of metal M being in the range from 3 to 6; the metal of the precursor of metal M only including simple or multiple bonds M-Z and/or M-M with Z=C, N, H, and any combination of these atoms; Y being sulfur and/or selenium; the substrate temperature being lower than or equal to 350° C.

Abstract: The present invention relates to the use, as a precursor for the chemical vapour deposition of PtSi at the surface of a support, of at least one organometallic complex of Pt comprising at least:—a ligand having a cyclic structure that comprises at least two non-adjacent C?C double bonds, or two ligands having a cyclic structure that each comprise a C?C double bond; and—a ligand chosen from *O—Si(R)3 and *N—(Si(R)3)2, with: the R units being chosen, independently of one another, from (C1-C4)alkoxy groups; the R? units being chosen, independently of one another, from (C1-C4)alkyl and (C3-C4)cycloalkyl groups; and * representing the coordination of the ligand to the platinum.

Abstract: The present invention relates to materials and particularly “organometallic-organic-inorganic hybrid materials” that can be used as heterogeneous catalysts for selective catalytic reactions. More precisely this invention relates to organic-inorganic hybrid nanostructured materials comprising a regularly distributed stabilized carbene that binds strongly to a metal so as to form a stable organometallic-organic-inorganic hybrid material having high catalytic performances.

Abstract: The present invention relates to a method for synthesizing metal or metal oxide nanoparticles by liquid-phase deposition on a surface layer of a substrate, comprising the following successive steps:—a step of thermally pretreating the conductor or semiconductor surface layer of a substrate, comprising the application of a specified temperature;—a step of impregnating the pretreated surface layer of the substrate with an organometallic complex in solution in an aprotic solvent;—a step of annealing under controlled atmosphere, and wherein the specified temperature is selected to obtain a predefined size of nanoparticles between 4 and 60 nm with a dispersion less than or equal to 30%. The invention is adapted to applications of nanoparticles in the field of microelectronics, optics or catalysis.

Abstract: The present invention relates to a process for producing a structured porous material comprising a structured inorganic framework made up of metal-oxide based walls in which nanoparticles of metal 0 are incorporated, which comprises the following steps: a) formation of a suspension of hydrophilic nanoparticles of metal 0 stabilized by non-exchangeable ligands that give the nanoparticles their hydrophilic character; b) growth of the inorganic framework from an inorganic precursor around the nanoparticles of metal 0 stabilized by the non-exchangeable hydrophilic ligands, in the presence of a pore-forming agent; and c) elimination of the pore-forming agent and at least partially of the non-exchangeable ligands that give the nanoparticles their hydrophilic character.

Abstract: The present invention relates to materials and particularly “organometallic-organic-inorganic hybrid materials” that can be used as heterogeneous catalysts for selective catalytic reactions. More precisely this invention relates to organic-inorganic hybrid nanostructured materials comprising a regularly distributed stabilized carbene that binds strongly to a metal so as to form a stable organometallic-organic-inorganic hybrid material having high catalytic performances.

Abstract: The invention concerns a method for preparing organic-inorganic hybrid materials with controlled porosity and functionality comprising hydrolysis and condensation polymerization of a compound of formula (I): Z-R1—Si(OR)(OR?)(OR?), with an alkaline or alkaline-earth silicate in a mol ratio of (I)/(silicate)=1:9, in the presence of a non-ionic surfactant, to form a mesoporous silica represented by Z-R1—SiO1.5 9 SiO2, whereon is then anchored an organic compound, represented by (?)N—H, comprising a —NH— group capable of reacting with Z, to form a functionalized mesoporous silica represented by (?)N—R—SiO1.5 9 SiO2, which is optionally complexed with a metallic cation to form an organometallic complex. The invention also concerns the use of these materials to separate gases.

Abstract: The invention concerns a method for preparing organic-inorganic hybrid materials with controlled porosity and functionality comprising hydrolysis and condensation polymerization of a compound of formula (I): Z-R1—Si(OR)(OR?)(OR?), with an alkaline or alkaline-earth silicate in a mol ratio of (I)/(silicate)=1:9, in the presence of a non-ionic surfactant, to form a mesoporous silica represented by Z-R1—SiO1.5 9 SiO2, whereon is then anchored an organic compound, represented by (?)N—H, comprising a —NH— group capable of reacting with Z, to form a functionalized mesoporous silica represented by (?)N—R—SiO1.5 9 SiO2, which is optionally complexed with a metallic cation to form an organometallic complex. The invention also concerns the use of these materials to separate gases.