フルオロカ-ボン鎖をもつ合成2分子膜

概要

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Micelles of fluorocarbon surfactants have peculiar physicochemical characteristics compared with those of the hydrocarbon counterparts. High efficiency and novel selectivity were attainable in the catalytic hydrolysis of phenyl esters by making use of the limited miscibility of fluorocarbon with hydrocarbon. <BR>Single-, double-, and triple-chain fluorocarbon amphiphiles with cationic or anionic head groups were prepared, and they formed clear aqueous dispersions upon sonication. Electron microscopy indicated the formation of bilayer structures (vesicle or lamella), similar to those of the hydrocarbon counterparts. DSC and fluorescence depolarization experiments established the presence of crystal-liquid crystal phase transition at temperatures higher than those of the hydrocarbon bilayers. The microenvironment of the fluorocarbon bilayer was apparently more viscous than those of hydrocarbon bilayers. <BR>Fluorocarbon bilayer vesicles were able to trap various water-soluble substrates such as riboflavin and possessed enhanced barrier capabilities against permeation of ions and organic, compounds. Phase-separated bilayer membranes, which were formed by mixing of fluorocarbon and hydrocarbon bilayers, were remarkably effective for the control of permeation and reaction characteristics.
日本膜学会の論文