70 results about "Ortho-mercaptobenzoic acid" patented technology

The invention relates to a dendritic polymer and particularly relates to a dendritic polymer with a high refractive index and a preparation method thereof. The dendritic polymer with the high refractive index is prepared by reaction on a dendritic polymer and a benzene ring or sulfydryl-containing organic compound under the action of a catalyst and a high-temperature-resistant oxidant, wherein the dendritic polymer is one or more of PAMAM-G1, PAMAM-G2 or PAMAM-G3; the benzene ring-containing organic compound is one or two of benzoic acid or hydroxyl salicylic acid and the sulfydryl-containing compound is one or more of thiosalicylic acid, sulfydryl sulfonic acid or sulfydryl phenylboronic acid. The dendritic polymer with the high refractive index as an additive is added into well-illuminated epoxy resin and an organic silicon material, so that the refractivity can be remarkably improved. The preparation method provided by the invention is simple in process and easy to realize.

The invention belongs to the field of molecular magnetics, and particularly relates to a novel cobalt (III)-sulfur cluster-based coordination polymer with a single-molecule magnet property. The three-dimensional skeleton of the cobalt (III)-sulfur cluster-based coordination polymer provided by the invention is ([Co(III)3Co(II)2(mba)6(Hdtb)(H2O)4]n). Monocrystal XRD research shows that the polymer is composed of a trinuclear cobalt (III)-sulfur cluster structural unit and two mononuclear cobalt (II), a three-dimensional complex network structure is formed through bridging of a 2-mercaptobenzoic acid divalent anion ligand, and a cobalt (III) atom cluster unit is a trinuclear linear cobalt (III) cluster and serves as a construction unit in the coordination polymer. Magnetics research shows that the slow magnetic relaxation phenomenon of cobalt (II) ions is the characteristic behavior of a single-molecule magnet under the condition of no external direct-current magnetic field.

The invention relates to a method for enhancing the SERS activity of silver decahedron nanoparticles by chloroauric acid. Generally speaking, the silver decahedron nanoparticles (DeAgNPs) and the trivalent gold ions are subjected to replacement reaction to obtain the silver core gold shell decahedron nanoparticles with different etching degrees, the decahedron nanoparticles are transferred to a silica gel substrate to form a two-dimensional film, and the surface Raman enhancement of the silver decahedron nanoparticles to 4-mercaptobenzoic acid (4-MBA) probe molecules is realized. Results showthat the silver decahedron nanoparticles etched by chloroauric acid with different concentrations correspond to the Raman enhancement of different degrees. The method is simple in raw material and lowin cost, and is safe and simple to operate; compared with the pure silver decahedron nano particles, the silver decahedron nanoparticles etched by the chloroauric acid (HAuCl4) prepared by the methoddisclosed by the invention are special in structure and good in stability and enable the SERS activity to be improved greatly. A method for detecting a to-be-detected object of the 4-thiosalicylic acid is simple and effective, is safe in operation process, is free of pollution, and can be applied to the water quality detection, biological detection and other aspects, and has the wide applicationprospects.

The invention relates to a preparation method of a heat conducing glue film with a high heat radiation performance, and belongs to the technical field of heat conducing glue film preparation. The preparation method comprises the following steps: at first, mixing ethylene-vinyl acetate copolymer and an antioxidant, heating the mixture, carrying out film casting, allowing the film to stand still for a while to cool the film; stretching the film, then allowing the film to stand still for a while to cool the film to obtain an ethylene-vinyl acetate microporous film, saving the ethylene-vinyl acetate microporous film for later use; then mixing acrylamide and 2-mercapto benzoic acid, heating, filtering, washing and drying the filter residues to obtain composite microgel, then mixing microgel with anhydrous ethanol, carrying out ultrasonic vibration and separation, mixing with deionized water, dropwise adding a silver nitrate solution, carrying out water bath heating, dropwise adding an ammonia liquor solution, allowing the mixed solution to stand still to carry out aging to obtain silver ion composite gel; finally soaking the ethylene-vinyl acetate microporous film in the silver ion composite gel, carrying out ultrasonic vibration, allowing the system to stand still, drying, performing hot pressing, finally allowing the system to stand still, and cooling. The prepared heat conducing glue film has a good heat radiation performance, the heat radiation performance is improved by 15 to 17%, and the heat conductivity can reach 2.55 to 2.65 W / M.K.