1643-20-5Relevant articles and documents
Shulman
, p. 3069,3071 (1965)
Shulman,Link
, p. 329 (1964)
Aggregation Numbers of Dodecyldimethylamine Oxide Micelles in Salt Solutions
Kaimoto, Hideki,Shoho, Kouki,Sasaki, Shigeo,Maeda, Hiroshi
, p. 10243 - 10248 (1994)
Micellel aggregation number m of dodecyldimethylamine oxide was determined as a function of the micelle composition or the degree of ionization of the micelle αM in 0.1 and 0.2 M NaCl at 25 deg C with light scattering and the steady state fluorescence probe method.The two methods gave consistent results in most cases.The aggregation numbers at the critical micelle concentration (cmc) were nearly identical for both cationic and nonionic micelles: about 70 and 80 in 0.1 and 0.2 M NaCl, respectively.The aggregation number increased as αM approached 0.4-0.5.The maximum values were about 100 and 150 for 0.1 and 0.2 M NaCl.At intermediate compositions, the Rayleight ratio of the scattered light incerased with the concentration, and this increase was interpreted as the increase of micelle size with concentration.Apparent aggregation numbers at a finite concentration were evaluated on the assumption of negligible contribution from the second virial coefficient.The idea of the growth of micelles was supported by dynamic light scattering but not by the fluorescence probe method.From the observed variation of the aggregation number at cmc with αM the width of the aggregation number distribution of nonionic micelles is estimated on the basis of a simple theory.
Kinetics and Preparation of Amine Oxides
Toney, C. Joe,Friedli, F. E.,Frank, P. J.
, p. 793 - 794 (1994)
A kinetic model for the oxidation of dimethyllaurylamine to its amine oxide with hydrogen peroxide was developed.It is a second-order reaction where k=.0250, .0079 and .0037 kg per mol/min at 75, 60 and 50 deg C, respectively.Amine oxides of N-lauryl morpholine, piperidine and 3-methyl piperidine were synthesized, and their rates of formation were determined.Compared to dimethyllaurylamine, the piperidines react slower, while the morpholine reaction is much faster. KEY WORDS: Amine oxides, dimethyllaurylamine, foam stabilizers, hydrogen peroxide, kinetics, morpholine, piperidine.
Reduction of Propellane Ketones in Solution Aggregates
Natrajan, Anand,Sukenik, Chaim N.
, p. 3559 - 3563 (1988)
The reduction of propellane diones and ketols has been studied in water containing cationic, anionic and zwitterionic surfactants.From the rate and stereochemistry of the reductions done in these media, the binding of neutral substrates and ionic reagents to surfactant aggregates has been probed.Surface interactions of these variously charged aggregates have been studied, and the behavior of aggregates with like charge but different structure (cationic aqueous micells, vesicles, and reverse micelles) has been compared.A picture of charge distribution at the surface of amine oxide zwitterionic micells has emerged.The oriented propellane binding (polymethylene aligned with surfactant tails and fused five-membered rings tangential to the aggregate surface) first proposed for propellanes bound to cationic micelles has been confirmed and extended to cationic vesicles and to amine oxide micelles.
A method for preparing an organic amine oxide
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Paragraph 0018, (2019/06/13)
A organic amine oxide preparation method, comprises the following steps: (1) organic amine as the raw material, the organic amine, solvent and the heteropoly acid quaternary ammonium salt catalyst is added to the container, heating (25 - 100 °C); (2) dropping hydrogen peroxide solution, dropping about 1.5 hours, the dropwise insulation reaction; (3) gas chromatographic detection reaction solution, when the organic amine content is reduced to 0.5% when, stopping the reaction, reaction filtering out catalyst, organic phase distillation shall have amine oxide. The invention relates to a method for preparing an organic amine oxide, its production process is simple, low energy consumption, the catalyst can be used repeatedly, can effectively reduce the production cost, and improves the economic benefit.
2,2,2-Trifluoroacetophenone as an organocatalyst for the oxidation of tertiary amines and azines to N-oxides
Limnios, Dimitris,Kokotos, Christoforos G.
supporting information, p. 559 - 563 (2014/04/03)
A cheap, mild and environmentally friendly oxidation of tertiary amines and azines to the corresponding Noxides is reported by using polyfluoroalkyl ketones as efficient organocatalysts. 2,2,2-Trifluoroacetophenone was identified as the optimum catalyst for the oxidation of aliphatic tertiary amines and azines. This oxidation is chemoselective and proceeds in high-to-quantitative yields utilizing 10 mol% of the catalyst and H2O2 as the oxidant.
