Interactions between an anionic porphyrin and cationic surfactants in water.
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概要
- 論文の詳細を見る
Interactions between decyl-, dodecyl-, and tetradecyltrimethylammonium bromide (DeTAB, DTAB, and TTAB) and an anionic porphyrin, 5,10,15,20-tetrakis(4-sulfonatophenyl)porphine (H<SUB>2</SUB>TPPS<SUP>4−</SUP>), have been studied in water at 298.2 K. Precipitate formation constants between the surfactant cations and the H<SUB>2</SUB>TPPS<SUP>4−</SUP> anion have been obtained. The precipitates were resolubilized by a further addition of the surfactants at concentrations close to the critical micelle concentrations (cmc) in DeTAB, and below the cmc's in DTAB and TTAB solutions. Surface tension and conductance measurements show that the effects of H<SUB>2</SUB>TPPS<SUP>4−</SUP> on the cmc's are very small. The fluorescence of H<SUB>2</SUB>TPPS<SUP>4−</SUP> is quenched in both water and sodium dodecyl sulfate solutions by the methylviologen cation, but not in cationic surfactant solutions. The diffusion coefficients were measured in a system containing H<SUB>2</SUB>TPPS<SUP>4−</SUP> and TTAB; the results show the existence of large premicellar aggregates.
- 公益社団法人 日本化学会の論文
著者
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Tominaga Toshihiro
Department Of Applied Chemistry Okayama University Of Science
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Endoh Satoshi
Department of Applied Chemistry, Okayama University of Science
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Ishimaru Hiroaki
Department of Applied Chemistry, Okayama University of Science
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