35results about How to "Heterogeneous catalysis" patented technology

The invention discloses an organic ligand L for synthesizing a triphase catalyst UiO-67-IM and the triphase catalyst UiO-67-IM. The triphase catalyst UiO-67-IM has the structural formula of [Zr6O4(OH)4L6]n, wherein n is a nonzero natural number. A preparation method of the triphase catalyst UiO-67-IM comprises the steps that the organic ligand L, ZrCl4 and acetic acid are dissolved into DMF, heat preservation is conducted for 24 hours at 120 DEG C, the temperature is lowered to room temperature, and then the metal organic framework UiO-67-IM is obtained. The catalyst can effectively catalyze a benzyl chloride azidation reaction, heavy metal salt does not need to serve as the catalyst, heterogeneous catalysis is achieved, the catalyst can be repeatedly utilized 5 times or above and is easy to recycle, the utilization rate of the catalyst is increased, and the cost is reduced; meanwhile, the catalyst is mild in reaction temperature, short in reaction time, low in dosage, free of other additives and beneficial for industrialized application and popularization.

The invention discloses an organic ligand, a Pd / Pb bimetallic organic framework, a synthesis method and application thereof, and the Pd / Pb bimetallic organic framework Pd / Pb-MOF has a structural formula of [Pb4(C42H28N8O8Pd)(C2O4) Br4] n, n is a non-zero natural number. The application of Pd / Pb-based bimetallic organic framework Pd / Pb-MOF as a catalyst in catalyzing the self-coupling of benzyne and the three-component coupling reaction of benzyne with boronic acid and allyl halide. The MOF catalyst with active sites provided by the invention can be used to replace some heavy metals to play a catalytic role, reducing the harm of heavy metals to the environment. The MOF catalyst with active sites of the present invention is used for catalysis to realize heterogeneous catalysis; at the same time, the bimetallic organic framework catalyst of the present invention can be reused more than five times, and the catalyst is easy to recycle, which improves the utilization rate of the catalyst and reduces the cost.

The invention relates to a preparation method and application of a chiral Zr-MOF catalyst, which belongs to the technical field of preparation of chiral catalysts. The structural formula of an organic ligand L of a chiral Zr-MOF catalyst is: (R)-4,4' ‑Dimethoxycarbonyl‑6,6'‑dichloro‑2,2'‑diethoxy‑1,1'‑binaphthyl reacted with sodium hydroxide to obtain organic ligand L. Organic Ligand L and ZrCl 4 Chiral Zr-MOF catalysts were prepared by solvothermal reaction. The step of the method for preparing α-nitrile alcohol by chiral Zr-MOF catalyst is to put benzaldehyde, TMSCN, Zr-MOF into the container, add solvent acetonitrile and stir, through centrifugation, decompression rotary evaporation concentration, column chromatography, acidification treatment , separation and drying to obtain α-nitrile alcohol. The chiral selectivity of the chiral α-nitrile alcohol obtained by catalyzing the reaction of benzaldehyde and cyanosilane with the chiral catalyst of the present invention is 97-99%.

The invention relates to the technical field of catalysts, in particular to a catalyst CuBr 2 @UiO‑66‑NH 2 ‑CF 3 COOH and its preparation method and application. The method comprises: 1) UiO-66-NH 2 placed in CF 3 Soak in the aqueous solution of COOH, separate the reaction liquid after completion, wash the obtained solid product, and obtain UiO‑66‑NH after drying 2 ‑CF 3 COOH; 2) UiO-66-NH of step 1) 2 ‑CF 3 COOH, soak in copper bromide solution, separate the reaction solution after completion, wash the obtained solid product, and obtain CuBr after drying 2 @UiO‑66‑NH 2 ‑CF 3 COOH. Catalyst CuBr of the present invention 2 @UiO‑66‑NH 2 ‑CF 3 COOH has a high utilization rate, mild reaction conditions, and is environmentally friendly, which can effectively reduce the cost of catalysis.

The invention discloses a novel solid-state three-phase catalyst. The novel solid-state three-phase catalyst comprises organic ligands L for synthesizing metal organic frameworks based on Cd(II), metal organic frameworks Cd-MOF-1 based on Co(II) and metal organic frameworks Cd-MOF-1' based on Co(II). A method for preparing the novel solid-state three-phase catalyst includes synthesizing the metal organic frameworks Cd-MOF-1 by the aid of the organic ligands L; arranging the metal organic frameworks CD-MOF-1 and 1-dodecyl bromide in a double-opening flask with the volume of 25 ml, adding 10 ml of anhydrous acetonitrile into the double-opening flask and heating the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile until the temperatures of the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile reach 80-90 DEG C; carrying out stirring reaction on the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile for 48 h; stopping heating the metal organic frameworks CD-MOF-1, the 1-dodecyl bromide and the anhydrous acetonitrile; arranging reaction systems in room-temperature environments; centrifugally separating the reaction systems; collecting precipitates; washing the precipitates by the aid of acetonitrile twice; washing the precipitates by the aid of methanol twice; washing the precipitates by the aid of diethyl ether twice to obtain the novel solid-state three-phase catalyst Cd-MOF-1'. The anhydrous acetonitrile is used as a solvent. The novel solid-state three-phase catalyst has the advantages that azidation reaction on 1-bromobutane can be effectively catalyzed by the novel solid-state three-phase catalyst without reaction of the traditional phase transfer catalysts, the reaction temperature is mild, and the novel solid-state three-phase catalyst is short in reaction time, low in usage and free of other additives, is easy to recycle as compared with the traditional phase transfer catalysts and can be reused by more than three times.

The present disclosure provides porous organic composites, synthesis methods and applications of in-situ loaded palladium nanoparticles. The porous organic composites include porous organic polymers and palladium nanoparticles, and the palladium nanoparticles are loaded on the porous organic polymers in situ. The repeating unit of the porous organic polymer has the following chemical structural formula: wherein, R is n-dodecyl. The porous organic composites provided by this disclosure perfectly combine the catalytic function of Pd NPs, the performance of imidazole-based ionic liquids, and the heterogeneous catalytic properties based on porous organic polymers to form a multifunctional catalytic system, which can finally meet the requirements of sustainable chemistry. and green synthesis requirements.

The invention relates to a metal organic complex of divalent zinc ions and a preparation method and application of the metal organic complex. An organic ligand L is prepared at first, and the structural formula is as shown in specification, the solution of the organic ligand L reacts with a zinc salt solution at room temperature to obtain a metal organic complex, and the metal organic complex hasa good catalytic effect in reaction of catalytic synthesis of diisopropylidene-D-mannitol as a catalyst.

The invention belongs to the technical field of catalyst preparation, and in particular relates to a chiral catalyst, (S)-DTP-COF and its preparation method and application. Wherein, the preparation method of the chiral catalyst (S)-DTP-COF is: trifluoromethanesulfonate cuprous, (S,S)-2,6-bis(4-phenyl-2-oxazoline-2 - Base) pyridine is placed in a round-bottomed flask, with chloroform as a solvent, stirring and dissolving. Add 2,5-dimethoxybenzene-1,4-diformaldehyde, 1,3,5-tris(4-aminophenyl)benzene and phenylacetylene into a round bottom flask, and stir at room temperature for 48 hours. Finally, add acetic acid and stir for 24‑48h to obtain (S)‑DTP‑COF. The catalyst can effectively catalyze the Michael addition reaction, and can realize heterogeneous catalysis without high temperature, less catalyst consumption and no other additives. At the same time, the catalyst can be reused and recycled easily, which improves the utilization rate of the catalyst, reduces the cost, and is beneficial to industrial popularization and application.

The invention discloses an organic ligand L for synthesizing a Co(II)-based metal-organic framework, a Co(II)-based metal-organic framework Co-MOF-1, and a Co(II)-based metal-organic framework Co- MOF‑2. Firstly, the metal-organic framework Co‑MOF‑1 was synthesized by the organic ligand L, and then the crystal of Co‑MOF‑1 was placed in the air at room temperature for 24 hours, and then kept at 70°C for 2 hours to obtain a new type with active sites. Point Catalyst Co‑MOF‑2. The catalyst can effectively catalyze the oxidation reaction of cyclohexane, does not require heavy metals as catalysts, reduces the harm of heavy metals to the environment, has mild reaction temperature, short reaction time, less catalyst consumption, no other additives, and compared with free heavy metal salts , can be reused more than five times.

The invention discloses a composite catalyst Cu(0)@UiO-66-NH2. The preparation method of the composite catalyst consists of: firstly, synthesizing a metal organic framework UiO-66-NH2; then, soaking the UiO-66-NH2 material in a copper acetate ethanol solution for 1h at room temperature, then conducting ethanol washing and drying to obtain a Cu(II)@UiO-66-NH2 composite metal organic framework material; and finally, reducing the Cu(II)@UiO-66-NH2 composite metal organic framework material with an aqueous solution of sodium borohydride so as to obtain the composite catalyst Cu(0)@UiO-66-NH2. The catalyst can effectively catalyze styrene reduction reaction without reaction of a transition metal as the catalyst, realizes heterogeneous catalysis, also can be reused more than five times, and the catalyst can be easily recovered, thus improving the utilization rate of the catalyst and reducing the cost. At the same time, the composite catalyst provided by the invention has the advantages of mild reaction temperature, shorter reaction time, small catalyst dosage, and no other additive, and is beneficial to industrial popularization and application.

The invention discloses four metal organic frames based on Co (II) and a preparation method and application of the four metal organic frames. The prepared metal organic frames can be adopted as a lewis acid catalyst for catalyze a chemical reaction, a Knoevenagel condensation reaction is efficiently catalyzed, a weak base catalyst reaction is not needed, corrosion of reaction liquid to a reaction container is reduced, reaction temperature is moderate, reaction time is short, the amount of the adopted catalyst is small, no other additives are needed, and compared with homogeneous catalysis, the metal organic frames can be repeatedly utilized five times or above.

The disclosure belongs to the technical field of COF catalysts, and specifically relates to a (R)-TAPP-BINOL-COF polymer, its preparation method and application. The present disclosure provides a preparation method and application of a covalent organic framework (R)-TAPP-BINOL-COF, wherein the (R)-TAPP-BINOL-COF is crystallized in the C2 space group. The catalyst can effectively catalyze the synthesis reaction of a clopidogrel intermediate through photothermal conversion under light conditions, the reaction conditions are mild, the reaction time is short, the amount of catalyst is small, it can be reused more than five times, and it is used in industrial production makes good economic sense.

The invention discloses a preparation method and application of nanometer Pd1.6Au1.0 alloy @Mn(II)MOF. Mn(II)-MOF is crystallized to a triclinic system, belongs to a P-1 space group, and has a node Mn (II) metal center at the coordination environment of a deformed octahedral {MnN2O4}, an octahedral coordination plane is occupied by 4 O atoms from para-diketone, and the Mn(II)-MOF is an N atom from pyridine in an axial direction. The Mn(II)-MOF is soaked in a solution of PdCl2 and K2AuCl4, and is reduced through sodium borohydride so that a nanometer Pd1.6Au1.0 alloy @Mn(II)-MOF catalyst is obtained. The catalyst can effectively catalyze a cascade reaction of benzyl alcohol and ampicillin, the reaction temperature is mild, the reaction time is short, the dosage of the catalyst is few, other additives are not used, and the catalyst can be recycled for 5 times or above.