4results about How to "Reduce electron cloud density" patented technology

This invention discloses a near-infrared photoactivated nitrogen mustard drug compound, its preparation method, and its applications. The general structural formula of the near-infrared photoactivated nitrogen mustard drug compound is shown below: where R1 and R2 are both optionally selected from methyl, ethyl, n-propyl, n-butyl, n-pentyl, and n-hexyl. This compound reduces the toxic side effects of nitrogen mustard through a prodrug strategy. This compound utilizes the synergistic effect of nitrogen mustard chemotherapy and photodynamic therapy with a photosensitizer to effectively inhibit tumor growth. Simultaneously, the introduction of the photosensitizer imparts fluorescence changes before and after nitrogen mustard drug release, enabling visualization of drug release. This compound has broad application prospects in reducing drug toxicity and anti-tumor activity. The near-infrared photoactivated nitrogen mustard prodrug / drug preparation method provided by this invention is simple, uses inexpensive and readily available raw materials, has a simple synthesis process, and is easy to separate and purify, making it suitable for large-scale production and widespread application.

This invention belongs to the field of air purification materials technology, specifically relating to a high-purity spherical zinc oxide-silica synergistic photocatalytic air purification material. By weight, it comprises 100 parts of silica-coated high-purity spherical zinc oxide, 1-3 parts of a silanized porphyrin trifluoromethyl functional polymer, 2400-2950 parts of ethanol, 101.5-204 parts of deionized water, and 0.006-0.06 parts of glacial acetic acid. The high-purity spherical zinc oxide-silica synergistic photocatalytic air purification material prepared by this invention exhibits improved interface stability, a broadened spectral response range, and pollutant degradation capabilities.

The application discloses a method for removing titanium impurities in phosphoric acid solution, which comprises the following steps: extracting the phosphoric acid solution containing titanium impurities by using an organic solvent, and collecting the organic phase; mixing the organic phase with the phosphoric acid solution, adding an oxidant and hydrofluoric acid, and mixing uniformly to obtain a mixed solution; adding an ammonium fluoride solution dropwise into the mixed solution to react, and obtaining a reaction solution; washing, clarifying and separating the phases of the reaction solution, and back-extracting the organic phase to obtain the phosphoric acid solution from which the titanium impurities are removed; the removal method is characterized in that: firstly, trace H2O2 is used to convert titanium into active peroxotitanium species; secondly, the initiation effect of NH4F is used to activate the activity of fluoride ions; finally, HF is used as a main fluorine source to form a stable fluorotitanium complex and migrate to the acid phase, and low-titanium purified phosphoric acid is obtained after separation, so that the removal of titanium impurities is realized.

This application discloses a hollow hierarchical nanowire sensitive material, its preparation method, and an ammonia sensor. The preparation method includes the following steps: (1) adding hollow carbon nanofibers to a mixture of ethanol and water and mixing evenly, then adding nickel salt and urea sequentially, and reacting at 70-90°C. The resulting precipitate is washed and dried, and then calcined at 300-400°C to obtain nickel oxide nanowires; (2) adding the nickel oxide nanowires obtained in the above steps to water and dispersing evenly, then adding aniline, protic acid, and an initiator sequentially, and reacting at 0-4°C. The resulting precipitate is washed and dried to obtain the hollow hierarchical nanowire sensitive material. This application can improve the sensitivity of ammonia sensor monitoring.