Amphiphilic Pyranines : Chromophore Wrapped in a Hydrophobic Alkyl Chain and Micelle Formation Induced by Complexation with Methylviologen
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Amphiphilic pyranines POC<I>n</I> (<I>n</I> = 8, 12, and 16) were synthesized, and their aggregation behaviors were investigated in water. <SUP>1</SUP>H NMR studies implied that POC16 existed in the conformation of the pyranine chromophore wrapped with a hexadecyl methylene chain, which showed no indication of aggregation at the concentration up to 10<SUP>−4</SUP> M. However, the formation of micelles was readily induced by the addition of methylviologen (MV<SUP>2+</SUP>) to a POC16 solution, which was responsible for an apparent large complexation constant of ca. 10<SUP>6</SUP> M<SUP>−1</SUP>.
- Chemistry Letters
Chemistry Letters 36(3), 364-365, 2007-03-05
The Chemical Society of Japan