Carrier effect of reversed micelle on imidazole catalyst.

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概要

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• The reversed micelles of neither didodecyldimethyl ammonium bromide(DDAB) nor sodium 1,4-bis(2-ethylhexyl) 2-sulfonatosuccinate(AOT) catalyse the decomposition of <I>p</I>-nitrophenyl acetate(PNPA) by themselves. However, these reversed micelles increase the action of imidazole in the decomposition of PNPA by solubilizing it. This interesting carrier effect of the reversed micelle on imidazole was investigated in both anhydrous and hydrous systems. The carrier effect of DDAB was greater than that of AOT. This difference was related to the different interaction between imidazole and each of the surfactants. The existence of the different interaction was made clear from the investigation on the change of chemical shift of the H(1) proton of imidazole upon solubilization by the reversed micelle. The mechanism of the decomposition of PNPA was partially explained from NMR measurements. Aminolysis occurred in anhydrous systems and hydrolysis in hydrous systems. Water pooled in the reversed micelle was more effective than bulk water in enhancing the catalytic effect of imidazole.

• 公益社団法人 日本化学会の論文

著者

• Kon-no Kijiro

  Science University of Tokyo

• Fujiwara Masami

  Science University of Tokyo

• Kitahara Ayao

  Science University of Tokyo

関連論文

• Carrier effect of reversed micelle on imidazole catalyst.
• Dependence of ζ-Potential upon Particle Size and Capillary Radius at Streaming Potential Study in Nonaqueous Media

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