2281-11-0Relevant articles and documents
Hydrophilic phase transfer catalyst based on the sulfoacid group and polyoxometalate for the selective oxidation of sulfides in water with hydrogen peroxide
Zhao, Wei,Yang, Chunxia,Liu, Kecheng,Yang, Ying,Chang, Tao
supporting information, p. 447 - 451 (2017/02/05)
A hybrid catalyst, based on SO3H-fuctionalized quaternary ammonium and polyoxovanadometalate, was synthesized and used for the selective oxidation of sulfides in water at room temperature. The highest turnover numbers (TON) can reach up to 1536. The organic products with high yields can be easily separated and the catalytic system can be used several times with the retention of catalytic activity.
Surface and Antimicrobial Activity of Sulfobetaines
Wieczorek, Daria,Gwiazdowska, Daniela,Staszak, Katarzyna,Chen, Ying-Lien,Shen, Tang-Long
, p. 813 - 822 (2016/07/06)
Sulfobetaines belong to the group of zwitterionic surfactants. They are electroneutral salts, which have in the same molecule, two ionic centers with different charge. Due to the specific structure they exhibit excellent properties such as good solubility in water and detergency. In this paper we present surface properties and adsorption parameters of sulfobetaines in water/air systems. From the adsorption isotherms the CMC value, the surface tension and surface pressure at the CMC as well as the efficiency of adsorption were determined. Physicochemical analyses of the data allowed for the further description of adsorption process. Results showed that sulfobetaines exhibit good surface properties especially low CMC and p20 values. Additionally the antimicrobial activity of sulfobetaines solutions against gram-positive and gram-negative bacteria were tested by the well-diffusion method. MIC values and growth kinetics were determined by microdilution method. Antimicrobial assays demonstrated that sulfobetaines can be good antibacterial agents, but the activity of surfactants strongly depends on alkyl chain length.
Sulfocompound selective catalytic oxidation reaction system in aqueous phase
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Paragraph 0017; 0018, (2018/02/04)
The invention provides a sulfocompound selective catalytic oxidation reaction system in an aqueous phase. A catalyst, a sulfocompound and 30% hydrogen peroxide are stirred for 1.5-2 hours under room temperature in the aqueous phase according to the molar ratio of the catalyst to the sulfocompound to the 30% hydrogen peroxide being 1 to 400 to 1200, wherein the conversion rate is greater than 97%, and the selectivity of the product namely sulphone is greater than 94%; the catalyst, the sulfocompound and the 30% hydrogen peroxide are stirred for 6 hours under the room temperature in the aqueous phase according to the molar ratio of the catalyst to the sulfocompound to the 30% hydrogen peroxide being 1 to 1666 to 1666, wherein the conversion rate is greater than 90%, and the selectivity of the product namely sulphoxide is greater than 80%. According to the reaction system disclosed by the invention, after the reaction is completed, extraction is performed with ethyl acetate, after an organic phase is separated, the catalyst dispersed in the aqueous phase can be directly used for the next catalytic reaction, and the catalytic activity, the conversion rate and the selectivity are all kept. The sulfocompound selective catalytic oxidation reaction system disclosed by the invention has the advantages that water is used as a solvent, the reaction condition is mild, the catalytic activity is high, the selectivity of products is good, the consumption of the catalyst is low, and the catalyst can be repeatedly used.
AMINO- OR AMMONIUM-CONTAINING SULFONIC ACID, PHOSPHONIC ACID AND CARBOXYLIC ACID DERIVATIVES AND THEIR MEDICAL USE
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Page/Page column 40, (2012/12/13)
The present invention relates to amino- or ammonium-containing sulfonic acid, phosphonic acid and carboxylic acid derivatives, in particular the compounds of formula 1, 2, 3, 4, 5 or 6, and their medical use, including their use in the treatment, prevention or amelioration of an inflammatory, autoimmune and/or allergic disorder.
Synthesis, characterization and surface properties of series sulfobetaine surfactants
Qu, Guangmiao,Cheng, Jiecheng,Wei, Jijun,Yu, Tao,Ding, Wei,Luan, Huoxin
experimental part, p. 31 - 35 (2012/01/13)
A series of surface active sulfo-propane betaines and sulfo-butane betaines were synthesized with high yields by the reaction of an appropriate N,N-dimethyl alkylamine with an excess of 1,3-propane sultone and 1,4-butane sultone. The structures were characterized by 1H-NMR spectroscopy and elemental analysis. The micellar properties of these compounds were determined by surface tension methods. Surface tension measurements also provide information about the dependence of the surface tension at the CMC (γcmc), pC20 (negative logarithm of the surfactant molar concentration C20 required to reduce the surface tension by 20 mN/m), the surface excess (Γmax) at air/solution interface, the minimum area per surfactant molecule at the air solution interface (A).
Shampoos containing polyglyceryl esters
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, (2008/06/13)
A shampoo formulation containing a polyglyceryl ester as the viscosity builder is disclosed. These polyglyceryl esters have the formula: wherein n is from 4 to 14 and one or more R groups is an acyl group containing from 8 to 22 carbon atoms and the remaining R groups are hydrogen. Such shampoos may be formulated to meet the criteria for both baby and adult shampoos without the need of using ethylene oxide derivatives. By tailoring the polyglyceryl ester employed, a pearlescent appearance can be created and characteristics such as viscosity and clarity may be affected.
The Upper Consolute Boundary in Zwitterionic Surfactant-Water Systems
Nilsson, Per-Gunnar,Lindman, Bjoern,Laughlin, Robert G.
, p. 6357 - 6362 (2007/10/02)
Selected zwitterionic surfactants display a liquid-liquid miscibility gap having an upper critical temperature, which differs in overall shape from the "cloud point" miscibility gap displayed by single-bond and semipolar surfactants.The dependence of the location of this phase phenomenon on the molecular structure of the surfactant and NMR investigations of the isotropic solution structure in the vicinity of the gap are reported.Lengthening the lipophilic group enlarges the area spanned by both the cloud point miscibility gap and the zwitterionic surfactant-water miscibility gap.However, increasing the size of proximate substituents further enlarges the former but shrinks the latter.This gap is most evident in ammonio sulfates, less so in ammonio sulfonates, and does not exist in ammonio carboxylate-water systems.NMR investigations of the structure of 3-(nonyldimethylammonio)propyl sulfate-water solutions in the region of its miscibility gap have been carried out using the pulsed field gradient spin-echo method.In addition, 1H NMR spectra have been recorded.The self-diffusion data, just below the independently measured critical micelle concentration (cmc), show that the surfactant exists as a molecular solution.In contrast to ionic surfactants, the concentration of molecular surfactant increases slowly above the cmc.Above the cmc, the self-diffusion data suggest that small, spherical micelles exist over a wide range of concentrations and temperatures.The NMR line widths observed in the continuous-wave mode are consistent with this interpretation.Estimates of the hydration levels of the surfactant suggest that hydration decreases with increasing concentration and temperature but remains relatively high even at 80 deg C.These studies reveal no anomalies in solution structure or aggregation phenomena in the vicinity of the miscibility gap.
