Application background and overview of nitrite tetrafluoroborate
Nitrosotetrafluoroborate can be used as a pharmaceutical synthesis intermediate or catalyst. If nitrite tetrafluoroborate is inhaled, please move the patient to fresh air; if the skin comes into contact, take off contaminated clothing, rinse the skin thoroughly with soap and water, and seek medical treatment if you feel uncomfortable; if the eyes come into contact, seek medical attention. Separate eyelids, rinse with running water or saline, and seek medical attention immediately; if ingested, rinse mouth immediately, do not induce vomiting, and seek medical attention immediately.
Application structure of nitrite tetrafluoroborate
Glycidyl m-nitrobenzenesulfonate
Applications of nitrite tetrafluoroborate
Nitrosotetrafluoroborate can be used as a pharmaceutical synthesis intermediate or catalyst. Examples of its application are as follows:
1) Used as a catalyst to prepare alkoxyiodobenzene, add alkoxybenzene, I2, catalyst nitrosium tetrafluoroborate (nitrite tetrafluoroborate) and organic solvent to the reaction vessel, seal the reaction vessel, The reaction is magnetically stirred at a temperature of 20 to 60°C and in the presence of air. After the reaction, it is cooled to room temperature. The reaction mixture is purified by column chromatography to obtain alkoxyiodobenzene. The preparation method of alkoxyiodobenzene of the present invention , except for catalysts and solvents, no other auxiliary reagents are added, and few auxiliary materials are used. Under optimal conditions, the utilization rate of iodine raw materials is high and the product purity is good. The reaction can be effectively carried out at room temperature, significantly reducing production costs, and the reaction system is No acid is added, which can reduce production equipment costs.
2) Preparing an ITO/WO3 nanocomposite electrochromic film with a nano-mosaic structure, including the steps:
(1) Dissolve the prepared ITO nanocrystals in a non-polar organic solvent to obtain a nanocrystal solution; (2) Add the polar solvent DMF and the ligand exchanger nitrosium tetrafluoroborate ( Nitrous tetrafluoroborate), let stand or centrifuge at low speed, transfer the ITO nanocrystals to the polar solvent DMF to form a DMF solution of ITO nanocrystals; (3) Add a tungsten source precursor to the DMF solution of ITO nanocrystals , to form a composite solution; (4) Add ethanol to the composite solution to adjust the viscosity and surface tension; (5) Coat the solution prepared in step (4) on the substrate using spin coating, pull-up method or spray coating method to form a composite solution. Wet film; (6) The wet film described in (6) is annealed in air to prepare a WO3 film. The invention also discloses the ITO/WO3 nanocomposite electrochromic film prepared by the above method. The preparation method of the invention is simple, low in cost and suitable for industrial production.
3) Used to prepare an electrode material for lithium-ion secondary batteries with high mass energy density under low temperature and high-speed charging and discharging.
The electrode material for lithium ion secondary batteries includes particles composed of LiFexMn1-w-x-y-zMgyCazAwPO4, the crystal structure is orthorhombic, and the space group is Pmna. According to the lattice constant of LiFexMn1-w-x-y-zMgyCazAwPO4 b1, c1, and the bc plane calculated from the lattice constants b2 and c2 of FexMn1-w-x-y-zMgyCazAwPO4, which was detached from LiFe sodium percarbonate xMn1-w-x-y-zMgyCazAwPO4 by oxidation treatment using nitrous tetrafluoroborate in acetonitrile. The mis-fit value [(1-(b2×c2)/(b1×c1))×100] is 1.32% or more and 1.85% or less.
