Clustering of Aerosol OT Reversed Micelles As Studied by Nonradiative Energy Transfer of Solubilized Probes

Autor:	Ayao Kitahara, Yuko Yamasaki, Masatoshi Hasegawa, Yoichi Shindo, and Tokuko Sugimura, Nanae Sonta
Rok vydání:	1996
Předmět:	Pyranine chemistry.chemical_compound Flocculation Aqueous solution chemistry Pulmonary surfactant General Engineering Analytical chemistry Molecule Physical and Theoretical Chemistry Excimer Fluorescence Micelle
Zdroj:	The Journal of Physical Chemistry. 100:15575-15580
ISSN:	1541-5740 0022-3654
DOI:	10.1021/jp961528m
Popis:	Water-soluble anionic fluorescent molecules tetrasodium 1,3,6,8-pyrenetetrasulfonate (PyTS) and trisodium 8-hydroxy-1,3,6-pyrenetrisulfonate (pyranine) were solubilized in separate reversed micellar cores in AOT/n-heptane system. The reversed micelle system showed an extent of nonradiative energy transfer from PyTS to pyranine higher than for the aqueous solution system in comparison at a critical probe concentration, [P]C. The values of [P]C, where each micelle is occupied by statistically one probe molecule, were determined as a probe concentration where the solubilized disodium 2,6-naphthalenedisulfonate (NpDS) begins to show the intramicellar excimer fluorescence. The results reveal that at surfactant concentrations higher than 0.1 M the AOT reversed micelles are not randomly dispersed in isolated state in n-heptane but form clusters through intermicellar flocculation.
Databáze:	OpenAIRE
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