6 results about "Methylammonium ion" patented technology

The invention discloses a pyridinedicarboxylic acid coordinated catalyst, a composite catalyst, a preparation method and an application. B is a calcium ion, a sodium ion, a magnesium ion, a lithium ion, a potassium ion, an ammonium ion, an octadecyl dimethyl benzyl ammonium ion, an octadecyl trimethyl ammonium ion, a dodecyl dimethyl benzyl ammonium ion, a dodecyl trimethyl ammonium ion, an octyl tributyl phosphonium ion, a tetrabutyl phosphonium ion, a hexyl tributyl phosphonium ion and a tributyl ethyl phosphonium ion; the ionic liquid is a tetrabutyl phosphonium ion, a tributyl hexyl phosphonium ion, a tetramethyl ammonium ion, a tetraethylammonium ion, a tetrabutyl ammonium ion, a benzyl trimethyl ammonium ion, a benzyl triphenyl phosphonium ion or a benzyl triethylammonium ion; m is Cr, Mo or W; r is a C1-C10 alkyl group; x is an integer between 1 and 20; and y is an integer between 1 and 40, so that the p-nitrotoluene oxidation reaction selectivity and the p-nitrotoluene conversion rate can be improved.

The invention discloses a quinoxaline-5-carboxylic acid coordinated catalyst which has a general formula shown in the specification, b is a sodium ion, a magnesium ion, a calcium ion, an aluminum ion, a rubidium ion, a cesium ion, an ammonium ion, a tetradecyl dimethyl benzyl ammonium ion, a tetradecyl trimethyl ammonium ion, a hexadecyl trimethyl ammonium ion, a hexadecyl dimethyl benzyl ammonium ion, a tributyl octyl phosphonium ion, a tetrapropyl phosphonium ion, a dipropyl dibutyl phosphonium ion and a dibutyl dihexyl phosphonium ion; the phosphonium ions are tetraheptyl phosphonium ions, tetrabutyl phosphonium ions, tetrabenzyl phosphonium ions, tetraheptyl ammonium ions, dimethyl diethylammonium ions, benzyl trihexylammonium ions, tribenzyl phenyl phosphonium ions or tetraphenyl ammonium ions; m is Mo, Cr or W; r is alkyl with 1 to 25 carbon atoms; x is an integer between 1 and 20; and y is an integer between 1 and 40. The catalyst can improve the oxidation reaction selectivity and conversion rate of ortho-nitrotoluene.

This application belongs to the field of photodetector technology, and relates to composite thin films and their preparation methods, preparation methods of A4BX6 crystals, and photodetectors. The composite thin film includes a first film layer and a second film layer. The material of the first film layer includes ABX3, and the material of the second film layer includes A4BX6; wherein A is selected from at least one of cesium ions, formamidinium ions, methylammonium ions, n-octylammonium ions, phenylethylammonium ions, benzylammonium ions, and tert-butylammonium ions; B is selected from at least one of lead ions and tin ions; and X is selected from at least one of iodide ions, bromide ions, and chloride ions. The composite thin film provided by this application simultaneously possesses high electron transport efficiency and high ultraviolet light sensitivity.

The present application relates to the field of perovskite thin film preparation, and relates to a preparation method of high-voltage electric field polarized perovskite quantum dot self-assembly deposition wafer-level thin film which can be peeled off reversely. Different from the traditional electrodeposition method, the method is to polarize perovskite quantum dots by applying high-voltage electric field, without adding electrolyte salt or using cyclic voltammetry to control the deposition time to prepare wafer-level thin film. The present application makes perovskite lattice distorted by high-voltage electric field polarization, promotes the ordered arrangement of methylammonium ions, and the short chain makes the exposed active sites on the surface of quantum dots more, the van der Waals force is enhanced, in addition, the low desorption energy of short chain ligand can promote the rapid and uniform spreading of perovskite quantum dots. The method realizes the growth of wafer-level thin film by the synergistic effect of external high-voltage electric field polarization force, intermolecular interaction force and van der Waals force between molecules and substrate. And by applying reverse voltage, the thin film can be peeled off to recover the material, which provides a new path for industrialized production of large-area perovskite quantum dot thin film.

The invention discloses a bipyridine coordinated catalyst, a preparation method of the bipyridine coordinated catalyst, a compound catalyst and application of the compound catalyst. B is a lithium ion, a sodium ion, a cesium ion, a magnesium ion, a strontium ion, an ammonium ion, a hexadecyl tetramethyl benzyl ammonium ion, an octadecyl tetramethyl ammonium ion, an octadecyl hexamethyl ammonium ion, a dodecyl dibutyl phosphonium ion, a tetradecyl propyl phosphonium ion, a butyl phosphonium ion, a tributyl ethyl phosphonium ion, a tetrabutyl phosphonium ion or a tributyl hexyl phosphonium ion; the ionic liquid is selected from ammonium ions, trimethylammonium ions, tetrapropylammonium ions, tributyl ethylammonium ions, benzyl dimethyl ammonium ions or benzyl dimethyl phosphonium ions; m is Mn; r is selected from C1-C14 alkyl groups; x is an integer between 1 and 18; and y is an integer between 1 and 36. The catalyst provided by the invention can improve the selectivity of nicotinic acid oxidation reaction and has strong reaction activity.

The invention relates to a water-based phenolic aldehyde amine epoxy curing agent as well as a preparation method and application thereof, and belongs to the technical field of curing agents. The water-based phenolic aldehyde amine epoxy curing agent is prepared from methylene ammonium ions, a phenol reactant and a polyether amine epoxy adduct through an addition reaction, and comprises components with a specific structural general formula, the preparation method comprises the following steps: reacting polyamine with urotropine to prepare methylene ammonium ions, and gradually adding a phenol reactant and a polyether amine epoxy adduct; the polyether amine epoxy adduct is prepared by carrying out ring-opening addition reaction on polyether amine and epoxy resin. The curing agent provided by the invention can ensure that formaldehyde residues are avoided in the preparation process, the use safety of the phenolic aldehyde amine epoxy curing agent is greatly improved, meanwhile, the curing agent has proper flowability, reaction activity and water resistance, the corrosion resistance, mechanical property and chemical resistance can be regulated and improved, and the curing agent has very high application value.