Electron processes in AOT reverse micelles. Part 1.—Absorption spectra and lifetimes of hydrated electrons as studied by pulse radiolysis

1994 ◽  
Vol 90 (22) ◽  
pp. 3411-3414 ◽  
Author(s):  
Jerzy L. Gębicki ◽  
Lidia Gębicka ◽  
Jerzy Kroh
Keyword(s):  
Absorption Spectra ◽  
Reverse Micelles ◽  
Pulse Radiolysis ◽  
Aot Reverse Micelles ◽  
Hydrated Electrons

scholarly journals Intermicellar material exchange in reverse micelles formed by ionic AOT and nonionic Igepal surfactants studied by means of pulse radiolysis. Influence of the temperature

2004 ◽  
Vol 2 (2) ◽  
pp. 371-387 ◽  
Author(s):  
Jerzy Gębicki
Keyword(s):  
Reverse Micelles ◽  
Pulse Radiolysis ◽  
Nonionic Surfactants ◽  
Activation Enthalpy ◽  
Exchange Process ◽  
Activation Parameters ◽  
Aot Reverse Micelles ◽  
Droplet Concentration ◽  
Enthalpy And Entropy ◽  
Material Exchange

AbstractThe recombination of thiocyanate anion radicals, (SCN)2−, formed pulse radiolytically within the water pools of reverse micelles stabilized with anionic AOT and nonionic Igepal surfactants, was proved as an indicator reaction to study intermicellar exchange. It was found that the exchange process is slower inIgepal than in AOT reverse micelles with the same water to surfactant ratio. The apparent activation enthalpy and entropy of the exchange process were determined in different alkanes. For the AOT and Igepal reverse micelles the activation parameters increase with the droplet size, but for the AOT systems they do not significantly change with the increase of droplet concentration. For non-percolated systems the activation parameters for Igepal reverse micelles approach those for AOT reverse micelles. This result supports existing suggestions that the mechanism of intermicellar exchange does not differ in principle between reverse micelles stabilized with ionic and nonionic surfactants.

scholarly journals Formose reaction accelerated in aerosol-OT reverse micelles

2016 ◽  
Vol 12 ◽  
pp. 2663-2667 ◽  
Author(s):  
Makoto Masaoka ◽  
Tomohiro Michitaka ◽  
Akihito Hashidzume
Keyword(s):  
Reverse Micelles ◽  
Water Layer ◽  
Major Product ◽  
Hexadecyltrimethylammonium Bromide ◽  
Interfacial Water ◽  
Formose Reaction ◽  
Aerosol Ot ◽  
Aot Reverse Micelles ◽  
Triton X ◽  
C Nmr

The formose reaction in reverse micelles of aerosol-OT (AOT), triton X-100 (TX), and hexadecyltrimethylammonium bromide (CTAB) was investigated. Time–conversion data have indicated that the interfacial water layer of AOT reverse micelles is a medium that accelerates formation of glycolaldehyde in the formose reaction. The 13C NMR spectra for the products of the formose reaction using formaldehyde-13C as starting material are indicative of the formation of ethylene glycol as a major product.

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