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Association of anionic surfactants with β-cyclodextrin. Fluorescence-probed studies on the 1:1 and 1:2 complexation

Title
Association of anionic surfactants with β-cyclodextrin. Fluorescence-probed studies on the 1:1 and 1:2 complexation
Authors
Park J.W.Song H.J.
Ewha Authors
박준우
SCOPUS Author ID
박준우scopusscopus
Issue Date
1989
Journal Title
Journal of Physical Chemistry
ISSN
0022-3654JCR Link
Citation
Journal of Physical Chemistry vol. 93, no. 17, pp. 6454 - 6458
Indexed
SCOPUS scopus
Document Type
Article
Abstract
Formation of inclusion complexes between anionic surfactants, alkanesulfonates (n = 5-8, 10, 12) and alkyl sulfates (n = 8, 10, 12, 14, 16, 18), and β-cyclodextrin was studied by a fluorometric method using 1-anilinonaphthalene-8-sulfonate (1,8-ANS) and 2-anilinonaphthalene-7-sulfonate (2,7-ANS) as probes. The association constants for 1:1 complexes of 1,8-ANS and 2,7-ANS with β-CD were determined as 85 and 1500 M -1, respectively, at 25°C. The first and second association constants of the surfactants with β-CD were calculated from competitive binding data of the surfactants and the ANS's with β-CD. The 2:1 β-CD-surfactant complexes were formed with alkanesulfonates of n ≥ 10 and alkyl sulfates of n ≥ 8. The surfactant-β-CD association was accompanied by a large increase in entropy, and hydrophobic binding appeared to contribute to a great extent to the association. Self-association of 1:1 complexes of surfactants of long hydrocarbon chains was also suggested. © 1989 American Chemical Society.
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자연과학대학 > 화학·나노과학전공 > Journal papers
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