4results about How to "Increase electrophilicity" patented technology

The present invention discloses a preparation and application of a CuS@NiCo‑LDHs hollow nano-octahedron heterojunction electrocatalyst. The preparation method comprises the following steps: using a Cu2O nano-octahedron as a hard template to undergo a precipitation conversion reaction with a soluble sulfide, growing a CuS shell layer on the surface of the Cu2O nano-octahedron, and obtaining a Cu2O@CuS nano-octahedron core-shell structure intermediate; etching the Cu2O@CuS nano-octahedron core-shell structure intermediate with an inorganic strong acid to remove the Cu2O core to obtain a CuS hollow nano-octahedron; heterogeneously growing a layer of NiCo‑LDHs nanosheets on the surface of the CuS hollow nano-octahedron to obtain the CuS@NiCo‑LDHs hollow nano-octahedron heterojunction electrocatalyst. The preparation method of the present invention is simple, the raw materials are abundant and easy to obtain, the time-consuming cycle is short, the product has high catalytic activity and good stability, and can be used for alkaline electrocatalytic oxygen evolution reaction.

This invention belongs to the field of acyclic compound technology, specifically relating to a method for preparing tert-amyl peroxide. A tert-amyl hydrogen peroxide aqueous solution is added to a solvent and stirred to obtain a mixed solution. Under stirring conditions, p-toluenesulfonic acid and ferric phosphide are added sequentially to the mixed solution. After the addition is complete, stirring continues to produce reaction solution I. Under stirring conditions, acetic anhydride is added to reaction solution I. After the addition is complete, stirring continues to produce reaction solution II. A washing solution is added to reaction solution II, and the mixture is stirred and washed, then separated to obtain crude tert-amyl peroxide. The crude tert-amyl peroxide is washed, dried, and the solvent is removed to obtain tert-amyl peroxide. This invention avoids the problems of large amounts of hydrochloric acid produced by traditional acyl chloride methods and the corrosiveness caused by using sulfuric acid as a catalyst. Furthermore, ferric phosphide is magnetic, allowing for recycling through magnetic separation after the reaction. p-Toluenesulfonic acid can be regenerated through ion exchange resin, significantly reducing production costs.

The invention discloses a method for preparing monoisopropanolamine, which comprises the following steps: using an aqueous solution of triisopropanolamine as a raw material, mixing with liquid ammonia, and then passing it into a reactor in which an imidization catalyst is loaded on the upper part and a hydrogenation catalyst is loaded on the lower part, and hydrogen is simultaneously passed through for reaction to prepare monoisopropanolamine; the imidization catalyst is a ruthenium / tin catalyst with a Lewis acid-modified porous oxide as a carrier; and the hydrogenation catalyst is a Cu-based catalyst with a pyridine-modified silicon-aluminum molecular sieve as a carrier. The present invention uses an aqueous solution of triisopropanolamine as a raw material, first through the action of an imidization catalyst, converting all C-N bonds into C=N bonds after all the C-N bonds are cracked, and then through the action of a hydrogenation catalyst, a highly selective catalytic generation of monoisopropanolamine can be achieved.

The application provides a nitrogen-containing fused aromatic ring compound and an organic electroluminescent device thereof, and relates to the technical field of organic electroluminescent materials. In order to solve the problems existing in the prior art of organic electroluminescent materials and devices, the application provides a nitrogen-containing fused aromatic ring compound, which is applied to an organic electroluminescent device as a host material of an electron transport layer, a hole blocking layer and a light-emitting layer, so that the luminous efficiency, driving voltage and service life of the device can be effectively improved. The novel nitrogen-containing fused aromatic ring organic compound has a high triplet energy level, appropriate HOMO / LUMO energy level, high electron affinity and electron mobility, is conducive to the transmission of electrons, balances the transmission of holes and electrons, and has a high decomposition temperature and glass transition temperature and good film-forming property, so that the stability and high efficiency of the device can be effectively ensured, and the luminous efficiency of the organic electroluminescent device can be significantly improved when the compound is applied to the organic electroluminescent device as a host material of a light-emitting layer.