40 results about "Sodium selenide" patented technology

Provided are a sputtering target that is capable of forming a Cu—Ga film, which has an added Ga concentration of 1 to 40 at % and into which Na is well added, by a sputtering method and a method for producing the sputtering target. The sputtering target has a component composition that contains 1 to 40 at % of Ga, 0.05 to 2 at % of Na as metal element components other than F, S and Se, and the balance composed of Cu and unavoidable impurities. The sputtering target contains Na in at least one form selected from among sodium fluoride, sodium sulfide, and sodium selenide, and has a content of oxygen of from 100 to 1,000 ppm.

The invention discloses a preparation method of selenide sodium alginate hydrogel. The method comprises the following steps: adding alginic acid into an activating agent; stirring and dissolving; thenincreasing the temperature and reflowing; drying the solvent by distillation after the reaction is finished, so as to obtain an alginic acid pre-crosslinked substance; dissolving the alginic acid pre-crosslinked substance into a reaction agent; adding a catalyst and a sodium diselenide water solution; stirring and reacting; washing twice with deionized water; drying by distillation to obtain selenide alginic acid; adding the selenide alginic acid into water; dropwise adding a sodium hydroxide water solution; stirring and dissolving; then packing; and performing light crosslinking treatment, thus obtaining the selenide sodium alginate hydrogel. The preparation method is simple in processes and low in energy consumption, and the raw materials are low in price and easy to obtain; the naturalproduct, namely, alginic acid, is used as the main raw material, and is nontoxic, harmless, high in biocompatibility, environmentally friendly, and applicable to industrial production; the prepared hydrogel is high in biocompatibility, high in mechanical intensity, high in transparence, beneficial for observing and monitoring, and worthy of popularization.

The invention relates to a preparation method for a selenium-containing macromolecule fluorescence probe. The method comprises the following steps: enabling o-position halogenated benzaldehyde and sodium diselenide to react in an organic solvent at 90-120 DEG C, thereby acquiring 2,2'-diphenyl diselenide; enabling 2,2'-diphenyl diselenide to react with 2,4-dimethyl pyrrole under an effect of catalyst, adding an oxidizing agent for continuing reacting, adding organic alkali and a complexing agent and reacting at 20-40 DEG C, thereby acquiring 2,2'-difluoro boron pyrrole diphenyl diselenide; performing free radical polymerization reaction on 2,2'-difluoro boron pyrrole diphenyl diselenide and a compound containing double bond at 20-70 DEG C, thereby acquiring the selenium-containing macromolecule fluorescence probe. The invention also discloses the selenium-containing macromolecule fluorescence probe prepared according to the method. According to the method provided by the invention, the selenium-containing diselenide is firstly prepared and then is utilized to regulate the polymerization of monomer, so that the selenium-containing macromolecule fluorescence probe can be acquired. The selenium-containing macromolecule fluorescence probe can be used for detecting oxides.

The invention provides a preparation method of L-selenocystine. The preparation method comprises the following steps: A) carrying out nucleophilic substitution reaction on sodium diselenide and N-acetyl-3-chloro-L-serine methyl ester to obtain N,N'-diacetyl-L-selenocystine dimethyl ester; B) hydrolyzing the N,N'-diacetyl-L-selenocystine dimethyl ester in a hydrochloric acid solution to obtain theL-selenocystine. The preparation method takes an N-acetyl-3-chloro-L-serine methyl ester chiral raw material as a substrate and sodium borohydride as a reducingagent, has the characteristics of easy-to-obtain and cheap raw materials, convenience for operation, moderate reaction conditions, single product, easiness for separation and high yield and the like and is suitable for industrial production. A test result proves that the specific rotatory power of the preparation method provided by the invention can reach that [alpha]D<20> is equal to -29.5 DEG (C 0.5, 0.1 MNaOH) and the highest yield of a product is 80.6 percent.

The present invention provides a sputtering target containing a high concentration of Na, which can suppress discoloration, generation of spots, and abnormal discharge, and has high strength and is not easily broken, and a manufacturing method thereof. The sputtering target of the present invention has the following composition: the metal components other than F, S, and Se as the sputtering target contain Ga: 10-40 at%, Na: 1.0-15 at%, and the remainder is composed of Cu and unavoidable impurities. The composition contains Na in the state of Na compound composed of at least one of sodium fluoride, sodium sulfide and sodium selenide, the theoretical density ratio is 90% or more, the flexural strength is 100N / mm2 or more, and the volume resistivity is 1mΩ · cm or less, within an area of ​​1 cm2 on the target surface, less than one agglomerate of at least one of sodium fluoride, sodium sulfide, and sodium selenide of 0.05 mm2 or more exists on average.

The invention belongs to the field of chemical transformation, and specifically discloses a method and a device for preparing selenocystine under mild conditions. The method is specifically to mix selenium powder, strong alkaline substance, water, and sodium triacetoxyborohydride, then add 3-chloro-L-alanine aqueous solution, and carry out stirring reaction; after the reaction is completed, after adding After acid and filtration, add alkali to the obtained filtrate to adjust the pH, and then stand and filter to obtain the filter residue, which is selenocystine. The invention has few side reactions, high utilization rate of raw materials, almost no generation of hydrogen or other undesired reactions. In addition, using sodium triacetoxyborohydride as a reducing agent to prepare sodium diselenide solution under strong alkaline conditions has very mild reaction, safety and reliability, simple and easy operation, mild and controllable reaction process, and has good application prospects.