42 results about "Salen ligand" patented technology

Chiral ruthenium catalysts comprising salen and alkenyl ligands are provided for stereoselective cyclopropanation, and methods of cyclopropanation are provided. The chiral ruthenium catalyst is prepared in situ by combining an alkenyl ligand, a deprotonated chiral salen ligand, and a ruthenium (II) metal. A preferred catalyst is prepared in situ by combining 2,3-dihydro-4-venylbenzofuran, deprotonated 1,2-cyclohexanediamino-N,N′-bis(3,5-di-t-butyl-salicylidene) and RuCl2(p-cymene)]2.

The present invention provides a synthesis method for preparing chiral or achiral binuclear Salen ligand by utilizing chiral or achiral diamine and derivative of monosalicylal and disalicylal. Said method adopts the following steps: firstly, making derivative of disalicylal be reacted with excess diamine, then adding excess derivative of monosalicylal to produce synthesis reaction to prepare the invented product. The described diamine can be chiral or achiral diamine and its ammonium salt.

The invention provides a bimetallic catalyst for catalyzing and oxidizing VOCs, a preparation method and application thereof. The catalyst uses titanium dioxide as a carrier, the active agent is a simple substance and / or an oxide of any element in ruthenium, palladium or platinum, and the cocatalyst is any one of tricobalt tetroxide, manganese oxide, copper oxide or nickel oxide. Through nano-control means, Salen ligands are used to synthesize nanoparticles uniformly composited with active agents and co-catalysts. There is a strong synergistic catalytic effect between the two, which can improve the catalytic oxidation efficiency of VOCs. The catalyst of the present invention has high activity and strong universality. The complete oxidation temperature for various VOCs is between 160 and 230°C. It has a good application prospect.

Ni(II)-Salen ligand metal-organic framework crystal material and its preparation method and application. The chemical formula of the material: {[Zn 4 O(L) 6 ]·DMF·H 2 O} n , where L is the dicarboxylate dicarboxylate of (R,R)-N,N'-bis(3-methyl-5-carboxysalicylidene)-1,2-diphenylethylenediamine nickel(II) Valence anion, n is the degree of polymerization. The metal organic framework crystal material adopts a solvothermal synthesis method, has simple operation, low cost, high yield, and is easy for large-scale industrial production. The prepared MOF crystalline material has high thermal stability (400°C), and the BET specific surface area is 228m 2 / g. For CO at 273K, 1atm 2 The adsorption capacity is 18.8m 3 / g. In the presence of an oxidizing agent, the selective oxidation of styrene is catalyzed in an aqueous phase to generate benzaldehyde with a yield of 99%. The catalyst is recycled five times with little loss of activity. In the presence of tetrabutylammonium bromide, 1 atm, 50 ℃ solvent-free catalysis of epoxy styrene and CO 2 The reaction produces styrene carbonate with a yield of 91%. The catalyst is recycled five times and still maintains its activity. This material is a good heterogeneous catalyst.

The preparation method of the Ni-Salen complex and the Ni-Salen complex belong to the technical field of Ni-Salen preparation. After electrodeposition of nickel ferricyanide complexes on the electrode surface, the Salen ligand is modified and electroactivated in lye. It uses electrodes to directly electrochemically synthesize Ni-Salen complexes, with simple steps and convenient operation.