283 results about "Mercapto Compounds" patented technology

The invention relates to a preparation method of a hyperbranched polymer-modified nano-silicon dioxide hybrid material. The preparation method comprises the following steps: grafting a mercapto group-containing silane coupling agent to the surface of nano-silicon dioxide, utilizing a surface mercapto group and polyfunctional acrylic ester to perform click reaction to form the modified nano-silicon dioxide with the tail end of the acrylic ester, further performing the click reaction with a polyfunctional mercapto compound to form the modified silicon dioxide with the tail end of the mercapto group, repeating the operation between the polyfunctional acrylic ester and the polyfunctional mercapto compound for multiple times, and forming a hyperbranched polymer on the surface of the silicon dioxide. The hyperbranched polymer-modified nano-silicon dioxide hybrid material prepared by the preparation method provided by the invention has the mercapto group at the tail end and a hyperbranched structure, when the hyperbranched polymer-modified nano-silicon dioxide hybrid material is applied in an ultraviolet curing coating, the heat resistance, the hardness, the wear resistance and other mechanical properties of the coating can be improved, and the hyperbranched polymer-modified nano-silicon dioxide hybrid material can particularly solve the problems of dispersion and migration of the nano-silicon dioxide in the ultraviolet curing coating and the problem of oxygen polymerization inhibition of the ultraviolet curing coating.

The invention discloses application of glutathione-based stable gold nano cluster particles to detection of a sulfhydryl compound, wherein the glutathione-based stable gold nano cluster particles are prepared from a chloroauric acid solution and a glutathione solution, wherein a molar ratio of chloroauric acid to glutathione is between 1:0.5 and 1:1. By using an fluorescence enhancement characteristic of the glutathione-based stable gold nano cluster particles after the addition of the sulfhydryl compound, through detecting the change of fluorescence intensity before and after the sulfhydryl compound with an unknown concentration reacts with the glutathione-based stable gold nano cluster particles, a linear standard curve chart is drawn, and a calibration relation is obtained by adopting linear fitting, so that the sulfhydryl compound with the unknown concentration is detected.

The invention relates to a fluorescence chemical sensor capable of selectively detecting a biological sulfhydryl compound, which is characterized by comprising the structural formula shown in the description, wherein, in the formula, R is one of the following structures shown in the description. The fluorescence chemical sensor, provided by the invention, has the advantages that the used raw materials are easily obtained, a synthetic method is simple, reaction conditions are easy to control, the sensitivity is high, the sub yield of the molecular weight of a product is high, a sulfhydryl-containing compound can be selectively recognized, and cysteine, glutathione and homocysteine can be separated from each other.

Sulfhydryl compounds, including hydrogen sulfide and mercaptans, may be removed from a fluid or gaseous stream or substrate by reacting the hydrogen sulfide and mercaptans in the stream with a scavenger of the structural formula:wherein R1, R2 and R3 are each independently selected from the group consisting of R4 and R5, R4 is a C1-C20 straight or branched chain alkyl group, R5 is —[(CH)m—NH]p—(CH2)nOH, n and m are independently an integer from 2 to about 6, p is from 1 to about 6; and wherein at least one of R1, R2 and R3 is R4 and at least one of R1, R2 and R3 is R5.

The invention chemically decorates the gold electrode surface with mercapto compound, like mercapto aniline, mercapto ethylamine, etc. It uses the mercapto end of the mercapto compound to combine with the gold electrode, chemically, and fixes the mercapto end on the gold electrode to make the amido on the other end exposed on the electrode surface. On a certain condition, the exposed amido can combine with the nano gold crystal by chemical bond, thus fixing the nano gold crystal on the gold electrode surface. The surface of the nano gold crystal has charges and can strongly absorb the antibody on the neutral or physiological pH condition, making the antibody fixed on the surface of the nano gold crystal, and thus making the nano immune biosensor.

The invention discloses an analysis method for combining chemical derivation with matrix auxiliary laser desorption ionization-time of flight mass-spectrometric technique (MALDI-TOF-MS). According to the method provided by the invention, polypeptide is adopted for deriving aldehyde and sulfydryl micromolecule metabolites, and after the to-be-detected micromolecule matter is derived, the MALDI-TOF-MS detection analysis is performed. After the micromolecule matter is subjected to polypeptide treatment, the simple single quasi-molecular ion peak [M+H]+ is acquired, so that the distinguishing degree of the micromolecule matter in a mass spectrum graph can be obviously improved and the detection sensitivity of the micromolecule matter in the mass spectrum is greatly increased. The method has the advantages of high sensitivity, strong universality, simple and convenient operation, no matrix interference and less sample loss; the sulfhydryl compound in ultralow content in a body fluid can be quantitatively detected, without preparation for a complex matrix and a deriving reagent; and the method has a huge application prospect in search on metabonomics.

The invention relates to an amphiprotic fluorescent whitener and and method for making same, comprising, firstly, further condensing cyanuric chloride with DSD acid, adding hydroxy or sulfhydryl compounds for secondary condensation, adding amino compound for third condensation, dropping alkaline solution of cation etherifying agent to the reaction system, and cationizing the condensation product in the third step; and, at last, the fluorescent whitener is obtained by filtrating and recrystallizing to purify and refine the product. The method for preparing cation etherifying agent amphiprotic fluorescent whitener has a simple process and causes small environment pollution. Compared with ordinary fluorescent whitener, the amphiprotic fluorescent whitener synthesized in the invention can sufficiently enhance the visual whiteness of the whitened material, and sufficiently extends the range of application of pH value.

The invention discloses a Biosynthesis method of a cadmium sulfide quantum dot. The method comprises the following steps of: on the basis of taking thioacetamide as an S source, water soluble cadmium salt as a Cd source, a sulfhydryl compound as a stabilizer and a phanerochaete chrysosporium mycelium pellet as an adsorbent, adding the S source, the Cd source and the sulfhydryl compound into a culture solution which contains the phanerochaete chrysosporium mycelium pellet to carry out shake cultivation on a shaking table, and carrying out filtration, cleaning in deionized water, ultrasonication, centrifuging and purification after the cultivation to obtain the cadmium sulfide quantum dot. The method provided by the invention is simple in operation, low in cost and good in reproducibility; and the prepared cadmium sulfide quantum dot has the characteristics of low toxicity, good biocompatibility and excellent optical property.

The invention provides lignin-based polyol, a modified lignin-based polyurethane material, a modified lignin-based polyurethane film, a preparation method and application, and belongs to the technicalfield of polyurethane industry. The preparation method provided by the invention comprises the following steps: mixing lignin, a sodium hydroxide solution, ethanol and an allyl compound, and carryingout an allylation reaction to obtain allylation modified lignin; and mixing the allylation modified lignin, an organic solvent and a sulfhydryl compound, and carrying out a sulfhydryl-alkene click reaction to obtain the lignin-based polyol. The lignin-based polyol prepared by the invention is used for preparing the modified lignin-based polyurethane material, and the prepared modified lignin-based polyurethane material has good mechanical properties, heat resistance and light aging resistance.