45results about How to "The synthesis method is stable" patented technology

The invention discloses a preparation method of a cation-modified molybdenum oxide or tungsten oxide nanowire with a large specific surface area. The preparation method comprises the following steps of: dissolving inorganic cations and a molybdenum source or tungsten source in deionized water, stirring solution, simultaneously regulating the pH value of the solution to be above an isoelectric point of molybdenum oxide or tungsten oxide by using protonic acid, then transferring into a self-pressure reaction kettle, reacting for 1-30 hours at a constant temperature of 100-240 DEG C after sealing, separating out solid products after the reaction is ended, washing, and drying to obtain the cation-modified molybdenum oxide or tungsten oxide nanowire with the large specific surface area. The cation-modified molybdenum oxide or tungsten oxide nanowire has the characteristics that the diameter is small, the distribution is narrow (3-10nm), the length-diameter ratio is more than 250, the porouseffect is achieved, the specific surface area is not smaller than 200m<2> / g, the degree of crystallinity is lower and the surface hydroxyl groups are rich and the like.

The invention discloses a method for preparing a sugar-containing polymer by combining affinic ROMP polymerization and mercapto-ene addition reaction. The present invention utilizes the gradient organic synthesis method, combined with the thiol-ene Michael Addition reaction (Thiol-ene Michael Addition), to prepare norbornene derivatives containing non-protecting groups of heterosaccharide monomers, followed by ring-opening metathesis polymerization ( ROMP) to obtain sugar-containing homopolymers with controlled molecular weight and narrow molecular weight distribution width. Based on the advantages of mercapto-ene addition reaction, the present invention provides a feasible platform and approach for preparing heterogeneous sugar-containing monomers with ordered side chain structures; The specific recognition mechanism of units and lectins and the development of functional sugar-containing polymers with special biodiagnostic functions have important guiding significance.

The invention discloses the preparation of a cyclo-metalated iridium-azo complex and an application of the cyclo-metalated iridium-azo complex to the detection of physiological thiol. The complex provided by the invention can react with the physiological thiol specifically to produce the fluorescent response, has strong cell membrane penetration capacity and low cytotoxicity, can be used for identifying the thiol in the cells and has a great application potential in the aspect of real-time and quick detection of the physiological thiol.

The invention discloses a europium-based coordination polymer nanosphere and a preparation method and application thereof. The preparation method of the europium-based coordination polymer nanosphere comprises the following steps of adding EuCl3.6H2O, H2BDC and polyvinylpyrrolidone to mixed solvent formed by mixing N, N-dimethylformamide and absolute ethyl alcohol, and conducting stirring till the materials are fully dissolved; then, transferring a mixed solution into a reaction still provided with a polytetrafluoroethylene inner container, and putting the reaction still in a drying oven at the temperature of 150 DEG C to leave the reaction still standing still for 12 hours; and then sequentially conducting cooling, centrifugalization, washing and vacuum drying, so that the europium-based coordination polymer nanospheres are obtained. A to-be-detected water body is added to fluorescent material suspension liquid prepared from the europium-based coordination polymer nanospheres; after being mixed uniformly, the materials are left standing still; and then a fluorescence spectrophotometer is adopted for detection, and the content of phosphate in the to-be-detected water body can be obtained. The europium-based coordination polymer nanosphere is stable in performance, not prone to photobleaching, good in water solubility, capable of effectively detecting the content of the phosphate in the water body, simple in synthesis method and low in raw material cost.

The invention relates to a method for preparing a mannose-containing derivative that can be used for post-polymerization modification by combining double click chemistry. First, under the action of propargyl bromide and acryloyl chloride, respectively, a Williamson-forming ether is used to prepare a mannose-containing derivative. Compounds with terminal alkynes and terminal alkenes. Then, the terminal alkene and the mercapto compound undergo a mercapto-ene addition reaction, and the terminal alkyne and the acetyl-protected α-D-mannopyranosyl azide undergo a CuAAC reaction. Compared with the prior art, the present invention successfully combines thiol substances of different structures with α-D-mannopyranosyl azide through the combined method of mercapto-ene addition reaction and GuAAC to prepare A mannose-containing derivative that can be used for post-polymerization modification is developed. The synthesis method is stable and efficient, and provides a considerable way for obtaining sugar-containing homopolymers with controllable molecular weight and narrow molecular weight distribution in the later stage.