B01J31/16

Hydrophobic palladium/metal organic framework material, preparation method thereof, and application therefor for use in synthesizing 2,5-dimethylfuran
11584729 · 2023-02-21 · ·

A hydrophobic palladium/metal organic framework (MOF) material, which is a solid catalyst material obtained by taking a porous MOF as a carrier, introducing elementary palladium by means of an immersion-reduction method, and performing polydimethylsiloxane coating layer processing. A method which uses hydrophobic palladium/MOF material to selectively catalyze hexoses to prepare 2,5-dimethylfuran comprises: dissolving a hexose into an alcohol; using the hydrophobic palladium/MOF material as a catalyst and polymethylhydrosiloxane as a hydrogen donor, reacting at 70 to 130° C. for 0.25 to 12 h under the action of an acidic additive; the concentration of the hexose in the alcohol is 0.2 to 10 wt %, and the total amount of Pd contained in the hydrophobic palladium/MOF material relative to a hexose is 0.1 to 5 mol %. The hydrophobic palladium/MOF material has a stable structure, and under the same conditions, has a catalyzing efficiency which is significantly higher than that of commercially available palladium on carbon and common palladium/MOF materials.

Hydrophobic palladium/metal organic framework material, preparation method thereof, and application therefor for use in synthesizing 2,5-dimethylfuran
11584729 · 2023-02-21 · ·

A hydrophobic palladium/metal organic framework (MOF) material, which is a solid catalyst material obtained by taking a porous MOF as a carrier, introducing elementary palladium by means of an immersion-reduction method, and performing polydimethylsiloxane coating layer processing. A method which uses hydrophobic palladium/MOF material to selectively catalyze hexoses to prepare 2,5-dimethylfuran comprises: dissolving a hexose into an alcohol; using the hydrophobic palladium/MOF material as a catalyst and polymethylhydrosiloxane as a hydrogen donor, reacting at 70 to 130° C. for 0.25 to 12 h under the action of an acidic additive; the concentration of the hexose in the alcohol is 0.2 to 10 wt %, and the total amount of Pd contained in the hydrophobic palladium/MOF material relative to a hexose is 0.1 to 5 mol %. The hydrophobic palladium/MOF material has a stable structure, and under the same conditions, has a catalyzing efficiency which is significantly higher than that of commercially available palladium on carbon and common palladium/MOF materials.

INTEGRATION OF METAL-ORGANIC FRAMEWORKS ON TEXTILE FIBERS AND FABRICS FOR THE DESTRUCTION OF NERVE AGENTS UNDER AMBIENT HUMIDITY CONDITIONS
20230048741 · 2023-02-16 ·

Textile fibers at least partially coated with a coating that includes particles of metal-organic frameworks dispersed in a polymeric base are provided. Also provided are fabrics formed from the textile fibers, protective gear and articles of clothing made from the fabrics, and methods of using the fibers and fabrics to catalyze the hydrolysis of organic molecules, such as organophosphate-based nerve agents, having hydrolysable bonds.

Ratiometric fluorescent probe, preparation method thereof, and application in detection of hydrogen peroxide

The present disclosure provides a ratiometric fluorescent probe, a preparation method thereof, and an application in detection of hydrogen peroxide. In the present disclosure, MoO.sub.x QDs (nanoenzymes) and Co/Zn-MOFs both have catalytic activity, and the large specific surface area and porous structure of Co/Zn-MOFs can provide more binding sites for the contact between nanoenzymes and substrates. Moreover, Co/Zn-MOFs have high catalytic activity similar to natural enzymes. When nanoenzymes with fluorescent properties encounter Co/Zn-MOFs with similar catalytic activity, they will collide with a spark of “synergy catalysis”, and the fusion of the two plays a role of synergy catalysis; in addition, the uniform cavity of Co/Zn-MOFs can provide “hosts” for nanoenzymes, and Co/Zn-MOFs provide “anchors” for MoO.sub.x QDs, avoiding the aggregation of MoO.sub.x QDs and enhancing the stability of the probe.

Method of fixating carbon dioxide to substituted oxazolidinones

A method of fixating carbon dioxide (CO.sub.2) to a substituted oxazolidinone. The method includes mixing a metal-organic framework (MOF), a co-catalyst, at least one para-substituted aromatic amine, and at least one epoxide to form a mixture. The method further includes contacting the mixture with a gas stream containing CO.sub.2 to react the CO.sub.2 in the gas stream with the epoxide and para-substituted aromatic amine to form a substituted oxazolidinone mixture. The MOF is a UiO-66-X MOF, where X is of formula (I) wherein at least one of R.sup.1 to R.sup.4 is an allyloxy group, and R.sup.1 to R.sup.4 are independently an allyloxy group or a hydrogen. ##STR00001##

SOLID-STATE CRYSTALLIZATION OF METAL ORGANIC FRAMEWORKS WITHIN MESOPOROUS MATERIALS METHODS AND HYBRID MATERIALS THEREOF
20230039640 · 2023-02-09 ·

A method, comprising i) contacting an aqueous solution of an organic ligand salt of the formula A.sub.x(L.sup.-x) with a mesoporous material (MPM) to form an impregnated mesoporous salt material of the formula A.sub.x(L.sup.-x)/MPM, ii) treating the impregnated mesoporous salt material with an aqueous acidic solution to form an impregnated mesoporous acid material of the formula H.sub.x(L.sup.- .sup.x)/MPM, iii) contacting an aqueous solution of a metal precursor of the formula M.sup.+y(B).sub.y with the impregnated mesoporous acid material to form an impregnated mesoporous metal organic framework precursor of the formula [M.sup.+y(B).sub.y][H.sub.x(L.sup.-x)]/MPM, and iv) at least one of 1) heating the impregnated mesoporous metal organic framework precursor in the absence of a solvent or 2) exposing the impregnated mesoporous metal organic framework precursor to a volatile vapor in the absence of a solvent such that the heating or the exposing forms a hybrid material of the formula (M.sup.+yL.sup.-x)/MPM, wherein the hybrid material comprises a nano-crystalline metal organic framework (MOF) embedded within the mesoporous material.

Metallocene catalyst compositions and polymerization process therewith

This invention relates bisindenyl metallocene catalyst compounds having long (at least 4 carbon atoms) linear alkyl groups substituted at the two position and substituted or unsubstituted aryl groups at the four position and process using such catalyst compounds, particularly in the solution process at higher temperatures.

Metallocene catalyst compositions and polymerization process therewith

This invention relates bisindenyl metallocene catalyst compounds having long (at least 4 carbon atoms) linear alkyl groups substituted at the two position and substituted or unsubstituted aryl groups at the four position and process using such catalyst compounds, particularly in the solution process at higher temperatures.

METHOD FOR STEREOSPECIFIC CYCLOADDITION REACTION

Metal-organic frameworks (MOFs) may have Zn(II), Pb(II), and/or Cd(II) as a central metal ion, a 4,4′-bipyridylethylene (bpe) ligand as a first ligand; and fumaric acid (fum) and/or oxalic acid (ox) as a second ligand, wherein the 4,4′-bipyridylethylene ligands are stacked in the MOF, and wherein a distance between two consecutive 4,4′-bipyridylethylene ligands is less than 5 Å. Cycloadditions, particularly photoinduced [2+2] cycloadditions may be catalyzed by such MOFs, and/or the conversion of photoinduced [2+2] cycloadditions in inventive MOFs may be increased by mechanical force, such as by grinding.

Removal of homogeneous catalysts from NMR/MRI agents hyperpolarized via sabre or PHIP

The present disclosure provides a method that embodies a simple and effective route to remove homogeneous catalysts from solutions wherein NMR/MRI signal amplification by reversible exchange (SABRE) or parahydrogen-induced polarization (PHIP) is performed. A method for recovering a homogeneous SABRE/PHIP catalyst for reuse is also described.