68207-00-1

Usage

Uses

Used in Nanotechnology:
Dodecylethyldimethylammonium bromide is used as a growth-directing surfactant for the synthesis of monodisperse gold nanorods. Its cationic nature allows for the controlled growth of these nanorods, which have potential applications in fields such as electronics, optics, and drug delivery.
Used in Polymer Synthesis:
In the polymer industry, Dodecylethyldimethylammonium bromide is used as a surfactant in the synthesis of poly(methyl methacrylate)-poly(N-isopropylacrylamide) core-shell particles via emulsion polymerization. Its presence helps in the formation of stable colloidal particles, which are essential for the development of advanced materials with tailored properties.
Used in Material Science:
Dodecylethyldimethylammonium bromide is also used as an additive in the synthesis of mesoporous nanocrystalline TiO2 microspheres. Its addition increases the degree of crystallization and modification in the texture of TiO2, which can enhance the performance of these materials in various applications, such as photocatalysis, solar cells, and sensors.

InChI:InChI=1/C16H36N.BrH/c1-5-7-8-9-10-11-12-13-14-15-16-17(3,4)6-2;/h5-16H2,1-4H3;1H/q+1;/p-1

Upstream product

• 74-96-4 ethyl bromide 
• 112-18-5 N,N-dimethylaminododecane 
• 598-56-1 N,N-dimethyl-ethanamine 
• 143-15-7 1-dodecylbromide 

Relevant academic research and scientific papers

Switchable oil-water phase separation of ionic liquid-based microemulsions by CO2

Phase separation of microemulsions plays an important role in many applications such as oil recovery, nanomaterials synthesis, and chemical reactions. However, reversible switching from ionic liquid-based microemulsions to complete oil-water phase separation has not been reported so far. In this work, we developed a novel class of stimuli-responsive microemulsions composed of CO2-responsive ionic liquids, n-pentanol and water. The microstructures and phase behavior of the microemulsion systems before and after the bubbling of CO2 were investigated by electrical conductivity, dynamic light scattering, small-angle X-ray scattering, cryogenic transmission electron microscopy, and optical microscopy. It was found that these microemulsions could be reversibly switched from W/O monophase to complete oil-water phase separation upon alternate bubbling and removal of CO2 at atmospheric pressure. Furthermore, 13C NMR spectroscopy was used to understand the CO2-driven reversible phase separation of the microemulsions. The results suggest that the mechanism behind the reversible phase separation involved the reversible formation of bicarbonate and carbamate from the reaction between CO2 and the anions of the ionic liquids in the presence of water, which resulted in the increase of ionic strength (or vice versa) in the mixture. Using the microemulsions as microreactors, the phase separation protocol was applied in the Knoevenagel reaction for an efficient coupling of a chemical reaction, product separation, and recycling of the microemulsions.

USE OF QUATERNARY AMMONIUM COMPOUNDS AS SPECIFIC BLOCKERS OF TRANSPORT THROUGH AQUAPORIN, COMPOSITIONS COMPRISING THE COMPOUNDS AND METHOD OF SELECTING THE COMPOUNDS

The present invention relates to the use of quaternary ammonium compounds for the preparation of a composition for specifically blocking transport through a particular type of aquaporin. The invention further relates to compositions comprising such quaternary ammonium compounds for use in various applications.

Properties of Dilute Aqueous Solutions of Double-Chain Surfactants, Alkyldodecyldimethylammonium Bromides with a Change in the Length of the Alkyl Chains

A series of cationic surfactants, dialkyldimethylammonium bromides with dodecyl as the primary alkyl chain and with methyl, ethyl, propyl, butyl, hexyl, octyl, and decyl as the second alkyl chain, as well as those with symmetric alkyl chains, dioctyl, didecyl and didodecyl ones, were synthesized, and their properties were investigated through measurements of the conductivity and air-liquid surface tension for their aqueous solutions to determine their critical micelle concentrations (cmc) and surface adsorption parameters in the formulation according to a two-dimensional lattice model in the form of the Frumkin equation. The change in cmc revealed that the free energy to transfer from water to the micelle per methylene unit is significantly small for asymmetric double-chain surfactants with a shorter second alkyl chain, and it approaches as elongating the second alkyl to those for the single-chain and symmetric double-chain surfactants. The free energy to transfer to an air-solution interface decreased approximately linearly with the total length of the hydrocarbon chains for all of the species examined. The lattice area for a symmetric double-chain surfactant molecule decreased with the length of its hydrocarbons. In a series of asymmetric ones, it showed a maximum for that with hexyl in its second alkyl.

Two-Phase Reaction of 1-Bromooctane with Sodium Acetate and Potassium Acetate Catalyzed by Diquaternary Ammonium Salts

New unsaturated diquaternary ammonium salts (diquats) were prepared in two ways from ditertiary amines 3 and 1-bromoalkanes or from 1,4-dibromobut-2t-ene and tertiary monoamines.A comparison of their catalytic ability with that of saturated diquats and with that of corresponding monoquats was made.The reaction of n-C8H17Br with NaOAc or KOAc in the two phase system liquid-liquid without an additional solvent is catalyzed more effectively by the unsaturated diquats than by the saturated diquats and the monoquats.Most of the used quats catalyze the ester formation from NaOAc more effectively in the system liquid-liquid, however, the ester formation from KOAc more effectively in the system solid-liquid; KOAc is generally superior to NaOAc in both systems.Consequently, in the phase-transfer catalyzed ester formation from alkali acetate and alkyl halides not only the structure of the quat but also the inorganic cation of the acetate have influence on the rate of conversion.