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Photochemical micelle control by long‐alkyl‐chain Malachite Green
Author(s) -
Uda Ryoko M.,
Kimura Keiichi
Publication year - 2007
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/poc.1178
Subject(s) - malachite green , micelle , chemistry , alkyl , malachite , photochemistry , pulmonary surfactant , critical micelle concentration , derivative (finance) , organic chemistry , aqueous solution , biochemistry , adsorption , copper , economics , financial economics
We have designed a Malachite Green leuconitrile carrying a long‐alkyl‐chain which controls micelle formation photochemically. The Malachite Green derivative, when ionized photochemically, exhibits some hydrophilicity by its triphenylmethyl cation and some hydrophobicity by its long alkyl chain. The behavior of the photoresponsive Malachite Green surfactant was studied in mixed micelle solutions containing cetyltrimethylammonium chloride (CTAC) and a small quantity of the Malachite Green. We found that UV irradiation drastically decreased the critical micelle concentration (cmc) of the mixed micelle solutions and that the Malachite Green derivative realized photoinduced uptake of oily substances based on its photogenerated amphiphilicity. The mechanism of the photoinduced enhancement of solubilizing oily substances is discussed at the viewpoint of the microscopic location of the Malachite Green surfactant in the micelle. Copyright © 2007 John Wiley & Sons, Ltd.