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Type: Journal article
Title: Encapsulation of curcumin in cationic micelles suppresses alkaline hydrolysis
Author: Leung, H.
Colangelo, H.
Kee, T.
Citation: Langmuir, 2008; 24(11):5672-5675
Publisher: Amer Chemical Soc
Issue Date: 2008
ISSN: 0743-7463
Statement of
Mandy H. M. Leung, Hannah Colangelo and Tak W. Kee
Abstract: The alkaline hydrolysis of curcumin was studied in three types of micelles composed of the cationic surfactants cetyl trimethylammonium bromide (CTAB) and dodecyl trimethylammonium bromide (DTAB) and the anionic surfactant sodium dodecyl sulfate (SDS). At pH 13, curcumin undergoes rapid degradation by alkaline hydrolysis in the SDS micellar solution. In contrast, alkaline hydrolysis of curcumin is greatly suppressed in the presence of either CTAB or DTAB micelles, with a yield of suppression close to 90%. The results from fluorescence spectroscopic studies reveal that while curcumin remains encapsulated in CTAB and DTAB micelles at pH 13, curcumin is dissociated from the SDS micelles to the aqueous phase at this pH. The absence of encapsulation and stabilization in the SDS micellar solution results in rapid hydrolysis of curcumin.
Keywords: Sodium Dodecyl Sulfate; Cetrimonium Compounds; Curcumin; Hydrolysis; Micelles; Hydrogen-Ion Concentration; Quaternary Ammonium Compounds; Cetrimonium
Description: Copyright © 2008 American Chemical Society
RMID: 0020080758
DOI: 10.1021/la800780w
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Appears in Collections:Chemistry and Physics publications
Environment Institute publications

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