A composite catalyst includes a carrier and noble metal particles supported by the carrier, wherein the carrier is a nitrogen-doped porous carbon composite material having a plurality of passages. The nitrogen-doped porous carbon composite material can include a nitrogen-doped porous carbon material and a plurality of metal oxide particles. The plurality of metal oxide particles can be uniformly distributed in the nitrogen-doped porous carbon material. The plurality of metal oxide particles can be partially exposed through the plurality of passages. The noble metal particles can be tightly combined with the exposed metal oxide particles to achieve recombination. And the noble metal particles can be at least one of Pd metal particles, Pt metal particles, Ru metal particles, Rh metal particles, Ir metal particles, Au metal particles, or a combination thereof.

The present disclosure features a strain-promoted [2+2+2] reaction that can be carried out under physiological conditions. In general, the reaction involves reacting a pi-electrophile with a low lying LUMO with a quadricyclane on a biomolecule, generating a covalently modified biomolecule. The selectivity of the reaction and its compatibility with aqueous environments provides for its application in vivo and in vitro. The reaction is compatible with modification of living cells. In certain embodiments, the pi-electrophile can comprise a molecule of interest that is desired for delivery to a quadricyclane-containing biomolecule via [2+2+2] reaction.

The present disclosure features a strain-promoted [2+2+2] reaction that can be carried out under physiological conditions. In general, the reaction involves reacting a pi-electrophile with a low lying LUMO with a quadricyclane on a biomolecule, generating a covalently modified biomolecule. The selectivity of the reaction and its compatibility with aqueous environments provides for its application in vivo and in vitro. The reaction is compatible with modification of living cells. In certain embodiments, the pi-electrophile can comprise a molecule of interest that is desired for delivery to a quadricyclane-containing biomolecule via [2+2+2] reaction.

Described herein are compounds of formula (I) as properfume compounds, as well as a method to release a compound being a carbonyl of formula (II), a formate ester of formula (III) and/or an alcohol of formula (IV), by exposing the compound of formula (I) to an environment wherein it is oxidized. Also described herein are a perfuming composition and a perfume consumer product including at least one compound of formula (I).

Described herein are compounds of formula (I) as properfume compounds, as well as a method to release a compound being a carbonyl of formula (II), a formate ester of formula (III) and/or an alcohol of formula (IV), by exposing the compound of formula (I) to an environment wherein it is oxidized. Also described herein are a perfuming composition and a perfume consumer product including at least one compound of formula (I).

Processes for converting a hydrocarbon reactant into an alcohol compound and/or a carbonyl compound are disclosed in which the hydrocarbon reactant and either a supported chromium (VI) catalyst or a supported chromium (II) catalyst are contacted, optionally with UV-visible light irradiation, followed by exposure to an oxidizing atmosphere and then hydrolysis to form a reaction product containing the alcohol compound and/or the carbonyl compound. The presence of oxygen significant increases the amount of alcohol/carbonyl product formed, as well as the formation of oxygenated dimers and trimers of certain hydrocarbon reactants.

Processes for converting a hydrocarbon reactant into an alcohol compound and/or a carbonyl compound are disclosed in which the hydrocarbon reactant and either a supported chromium (VI) catalyst or a supported chromium (II) catalyst are contacted, optionally with UV-visible light irradiation, followed by exposure to an oxidizing atmosphere and then hydrolysis to form a reaction product containing the alcohol compound and/or the carbonyl compound. The presence of oxygen significant increases the amount of alcohol/carbonyl product formed, as well as the formation of oxygenated dimers and trimers of certain hydrocarbon reactants.

This invention relates to macrostructures (and pharmaceutical formulations containing them) that include a parallel coiled-coil structure, wherein the parallel coiled-coil comprises a first coil of Formula I and a second coil of Formula II:
T.sub.1-f.sub.0-g.sub.0-a.sub.1-b.sub.1-c.sub.1-d.sub.1-e.sub.1-f.sub.1-g.sub.1-a.sub.2-b.sub.2-c.sub.2-d.sub.2-e.sub.2-f.sub.2-g.sub.2-a.sub.3-b.sub.3-c.sub.3-d.sub.3-e.sub.3-T.sub.2(I)
T.sub.3-g.sub.0-a.sub.1-b.sub.1-c.sub.1-d.sub.1-e.sub.1-f.sub.1-g.sub.1-a.sub.2-b.sub.2-c.sub.2-d.sub.2-e.sub.2-f.sub.2-g.sub.2-a.sub.3-b.sub.3-c.sub.3-d.sub.3-e.sub.3-f.sub.3-T.sub.4(II),
as described in the present application. Methods of using these macrostructures are also disclosed.

This invention relates to macrostructures (and pharmaceutical formulations containing them) that include a parallel coiled-coil structure, wherein the parallel coiled-coil comprises a first coil of Formula I and a second coil of Formula II:
T.sub.1-f.sub.0-g.sub.0-a.sub.1-b.sub.1-c.sub.1-d.sub.1-e.sub.1-f.sub.1-g.sub.1-a.sub.2-b.sub.2-c.sub.2-d.sub.2-e.sub.2-f.sub.2-g.sub.2-a.sub.3-b.sub.3-c.sub.3-d.sub.3-e.sub.3-T.sub.2(I)
T.sub.3-g.sub.0-a.sub.1-b.sub.1-c.sub.1-d.sub.1-e.sub.1-f.sub.1-g.sub.1-a.sub.2-b.sub.2-c.sub.2-d.sub.2-e.sub.2-f.sub.2-g.sub.2-a.sub.3-b.sub.3-c.sub.3-d.sub.3-e.sub.3-f.sub.3-T.sub.4(II),
as described in the present application. Methods of using these macrostructures are also disclosed.

The present invention concerns a method for producing for producing and purifying 2,3,3,3-tetrafluoro-1-propene (1234yf) from a first composition comprising 2,3,3,3-tetrafluoro-1-propene and chloromethane (40), said method comprising the steps of: (a) bringing said first composition into contact with at least one organic extractant in order to form a second composition; (b) extractive distillation of said second composition in order to form (i) a third composition comprising said organic extractant and chloromethane (40); and (ii) a stream comprising 2,3,3,3-tetrafluoro-1-propene (1234yf); (c) recovering and separating said third composition, preferably by distillation, in order to form a stream comprising said organic extractant and a stream comprising chloromethane (40).