Hydrogen bonding of alcohols with AOT in carbon tetrachloride: an infrared study

Abstract

PIERRE MENASSA and CAMILLE SANDORN. Can. J. Chem. 63, 3367 (1985).The interaction of the inverted micelles of AOT (sodium di(2-ethylhexyl)sulfosuccinate) with different alcohols due to hydrogen bonding has been studied by means of infrared spectroscopy. Spectra of solutions of the alcohols with increasing concentrations of AOT showed a decrease in the intensity of the free OH stretching band. At the same time a new OH band due to a H-bonded alcohol-inverted micelle complex appears and its intensity increases as the intensity of the free band decreases. Calculated values of the equilibrium constants for the formation of the complexes n-alcohol-AOT, showed a decrease in alcohol-AOT association with the increase of the length of the aliphatic chains in the n-alcohols. Surprisingly, cholesterol behaved like a short chain while other cyclic alcohols like long chain alcohols.PIERRE MENASSA et CAMILLE SANDORFY. Can. J. Chem. 63, 3367 (1985).L'interaction dans le tttrachlorure de carbone des micelles inverses du bis(Cthy1-2-hCxyl) sulfosuccinate de sodium (AOT) avec differents alcools a Ct C CtudiCe par spectroscopie infrarouge. L'Ctude spectroscopique de differentes solutions d'alcool et d'AOT montrent une diminution de I'intensitC de la bande OH libre alors que paralltllement I'intensitC d'une bande associCe alcool-AOT augmente. Les calculs des constantes d'association n-alcool-AOT indiquent une diminution du degre d'association avec la longueur de la chaine hydrocarbure. Le cholestCrol se comporte comme un alcool j. chaine courte tandis que d'autres alcools cycliques se comportent comme des alcools j. chaine longue.

Substituent Effects on Binding Constants of Carotenoids to n-Heptane/AOT Reverse Micelles

“…Thus, the binding for the carotenoid alcohol 1 behaves as due mainly to hydrogen bond complexes with the AOT polar heads at the micelle interface. Moreover, the value of K b for 1 is quite reasonable compared with that obtained for other longchain alcohols (35,40) and follows the trend that the longer the chain of the alcohol the smaller the association constant. This trend can be understood in terms of the location of the polyene chain in a hydrocarbon-like environment.…”

Preparation of Ultrafine Titanium Dioxide Particles Using Hydrolysis and Condensation Reactions in the Inner Aqueous Phase of Reversed Micelles: Effect of Alcohol Addition

“…When TiO 2 particles were prepared with the addition of 2-propanol, the alkyl chain length of which is the same as that of TTIP, to the system, the particle size was found to increase with the increasing amount added of the alcohol, contrary to expectation (Table ). This would be due to an increase in the proportion of free water, resulted from a decrease in the proportion of the water strongly bound to the hydrophilic groups of reversed micelles, because 2-propanol is reported to be solubilized in reversed micelles . What have so far been mentioned demonstrate that the polarity of mixed solvents affects insignificantly the decrease in the size of the TiO 2 particles formed.…”

Binding of Nitrodiphenylamines to Reverse Micelles of AOT inn-Hexane and Carbon Tetrachloride: Solvent and Substituent Effects

“…It is known that AOT forms reversed micelles in refer to the maximum absorption wavelength of the free and bound compound, respectively. these solvents (46,47). The water content that these micelles accept is near 11.…”