49 results about "O-aminobiphenyl" patented technology

A method for detecting 10 types of aromatic amines compounds (including aniline, ortho toluidine, m-toluidine, p-aminotoluene, m-phenylenediamine, m-methoxyaniline, 1- naphthylamine, 2- naphthylamine, 3- aminobphenyl and 4- aminobphenyl) in cigarette mainstream smoke by liquid chromatography-tandem mass spectrometry is characterized in that a Cambridge filter and an absorbing bottle containing 5% of HC1 solution respectively gather the aromatic amines compounds in a particle phase matter and a gas phase matter of mainstream smoke, after the 5%HCI solution is used for extracting the aromatic amines compounds on the filter, the aromatic amines compounds are purified by an HLB (hydrophile-lipophile balance) solid-phase extraction column, and a liquid chromatography-tandem mass spectrometry instrument is used for determining the 10 types of aromatic amines in the mainstream smoke in cigarettes. Compared with an existing GC-MS (gas chromatography-mass spectrometer) analysis method for detecting aromatic amines in mainstream smoke of cigarettes, the method does not need derivatization reaction or liquid-liquid extraction operation, greatly simplifies pretreatment steps of samples, improves analysis efficiency, and can more comprehensively detect harmful aromatic amines compounds in mainstream smoke of cigarettes.

The invention provides a preparation method of an organic covalent framework material with a large aperture. Adopt solvothermal method to prepare cuprous chloride catalyst with nanometer scale, select 1,3,5-three [4-amino (1,1-biphenyl-4-yl)] benzene and benzidine as monomer molecule, in Preparation of Organic Polymers by Amino Coupling Reaction Catalyzed by Cuprous Chloride Nanocrystals. The method disclosed in the invention can be carried out at room temperature, the reaction conditions are mild, and it has the characteristics of simple preparation, low cost, and easy industrial batch production, and the prepared polymer has large pore size, high chemical stability and thermal stability , can be used in composite electrode materials, organic dyes, biomedicine and many other fields.

The invention discloses a preparation method and application of a fluorescent covalent organic framework connected by imine bonds, and belongs to the technical field of environmental protection. Reaction of 1,3,6,8-tetrakis(4-formylphenyl)pyrene and 4,4'-diamino-[1,1'-biphenyl]-3,3'-diol via Schiff base Synthesis of imine-linked fluorescent covalent organic frameworks. The fluorescent covalent organic framework uses imine bonds as connecting units, surrounded by a large number of hydroxyl functional groups, which can selectively bind uranyl ions. Meanwhile, based on the excellent fluorescence properties of pyrene-based units, a rapid and sensitive detection method for uranyl ions was established. In addition, the phenolic hydroxyl groups in the imine-bonded fluorescent covalent organic framework can also reduce soluble U(VI) to insoluble U(IV), which greatly improves the adsorption capacity for uranyl ions. The method of the invention has the advantages of simple method, stable structure and environmental friendliness for preparing the imine bond-linked fluorescent covalent organic framework, which can be used for highly sensitive detection and selective recovery of uranyl ions, and has good application prospects.