5 results about "Iobenzamic acid" patented technology

The invention discloses a preparation method of 5-fluoro-2-iodobenzoic acid, which comprises the following steps: (1) taking a compound (IV) 2-nitro-5-fluorobenzoic acid methyl ester as an initial raw material, and carrying out reduction reaction on the initial raw material and zinc powder to generate a compound (III) 2-amino-5-fluorobenzoic acid methyl ester; (2) sequentially carrying out a diazotization reaction and a Sandmeyer iodination reaction on the compound (III) 2-amino-5-fluorobenzoic acid methyl ester to generate a compound (II) 2-iodo-5-fluorobenzoic acid methyl ester; and (3) carrying out hydrolysis reaction on the compound (II) 2-iodo-5-fluorobenzoic acid methyl ester and sodium hydroxide to generate a compound (I), namely the 5-fluoro-2-iodobenzoic acid. The preparation method disclosed by the invention has the advantages that the reaction conditions are mild, and dangerous chemical reactions are not involved; the operation is simple, complicated purification modes such as column chromatography are avoided, and kilogram-level preparation is facilitated; the raw materials are cheap and easy to obtain, the cost is lower, the steps and atom economy are better, and efficient synthesis economics is met; the total yield is relatively high, and the economic value is extremely high.

The present application relates to a kind of 2-methoxy-4-acetylamino-5-iodobenzoic acid methyl ester preparation method, steps include: S1, by p-aminosalicylic acid and acetic anhydride reaction, preparation 4-acetylamino salicylic acid;S2, by the 4-acetylamino salicylic acid and dimethyl sulfate reaction, preparation 2-methoxy-4-acetylamino benzoic acid methyl ester;S3, by the 2-methoxy-4-acetylamino benzoic acid methyl ester and iodine reaction, preparation 2-methoxy-4-acetylamino-5-iodobenzoic acid methyl ester.The preparation method of the present application is compared with prior art, and reaction step is shortened to three steps, and total yield is as high as 70% or so;While the yield of iodine substitution reaction is increased from 29% to more than 90%.

The invention discloses a europium-based light conversion agent for an agricultural film and a preparation method and application of the europium-based light conversion agent, the chemical formula of the light conversion material is Eu2 (C7H5IO2) 6 (C12H8N2) 2, and the molecular formula of the material is C66H46O12N4I6Eu2. The preparation method comprises the following steps: dissolving 3-iodobenzoic acid and phenanthroline in ethanol, then adding an aqueous solution of EuCl3. 6H2O, and carrying out solvothermal reaction and cooling to obtain colorless flaky crystals, namely the red light conversion material Eu2 (C7H5IO2) 6 (C12H8N2) 2. The light conversion material disclosed by the invention generates red fluorescence with the intensity of 7.7 * 10 < 7 > a.u. Under the irradiation of incident light with the wavelength of 334 nm; and red fluorescence with the intensity of 2.7 * 10 < 6 > a.u. Is generated under the irradiation of incident light with the wavelength of 544 nm. The preparation process is simple, chemical components are easy to control, repeatability is good, and solubility is good.

This invention discloses a method for preparing 2-carboxylic acid diphenyl iodide ester. The method involves using 2-iodobenzoic acid and benzene as raw materials in an acidic solvent, with potassium persulfate and a heteropolyacid metal salt as a mixed catalyst, and controlling the reaction temperature at 10℃~20℃ to synthesize 2-carboxylic acid diphenyl iodide ester. The product is then purified. The mass ratio of 2-iodobenzoic acid, benzene, and the mixed catalyst in this invention is 250:85~95:2~5. The synthetic route is simple, and the purity of the prepared product is over 99.9%, meeting the high purity requirements of electronic chemical raw materials. The yield can reach approximately 90%, demonstrating high industrial application value. Furthermore, the catalyst used in this invention can be recycled, further reducing production costs.

The application relates to a perovskite solar cell doped with a hole transport layer bifunctional oxidant and a preparation method thereof, and belongs to the technical field of perovskite solar cell preparation. The bifunctional oxidant (2-iodoxybenzoic acid) used in the application can accelerate the conversion of spiro-OMeTAD to spiro-OMeTAD + under an N2 atmosphere, avoids the adverse effects of water and oxygen on the stability of the device during a long air oxidation process, the generated cations can improve the conductivity and hole mobility of the hole transport layer, the reduction product of 2-iodoxybenzoic acid is o-iodobenzoic acid, the functional groups (-C=O and -I) contained in the o-iodobenzoic acid can effectively passivate uncoordinated lead ions on the surface of the perovskite active layer, thereby reducing the defect state density on the perovskite surface, and finally, the method of doping spiro-OMeTAD with 2-iodoxybenzoic acid can improve the photoelectric conversion efficiency and long-term stability of the perovskite solar cell.