Simple Spectrophotometric Method to Measure Surfactant CMC by Employing the Optical Properties of Curcumin's Tautomers

Autor/inn/en	Mabrouk, MokhtarM.; Hamed, Nouran A.; Mansour, Fotouh R.
Titel	Simple Spectrophotometric Method to Measure Surfactant CMC by Employing the Optical Properties of Curcumin's Tautomers
Quelle	In: Journal of Chemical Education, 98 (2021) 8, S.2603-2609 (7 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Mansour, Fotouh R.)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
DOI	10.1021/acs.jchemed.1c00242
Schlagwörter	Organic Chemistry; Measurement Techniques; Optics + Suchen Sie Ihr Suchwort? Organische Chemie; Messtechnik; Optik
Abstract	SSurfactants or surface-active agents are interesting groups of compounds with characteristic structures, allowing them to decrease the surface tension. A surfactant consists of a hydrophilic head and a hydrophobic tail. Typically, surfactant molecules aggregate into micelles at the critical micelle concentration. In this work, the concept of tautomerism has been successfully used for the determination of the critical micelle concentration of cetyltrimethylammonium bromide using curcumin as a colored probe. The ratio between diketo and keto--enol tautomers of curcumin increases by increasing the concentration of cetyltrimethylammonium bromide above the critical micelle concentration. This ratio can be monitored by measuring the absorbance ratio at A[subscript ?360]/A[subscript ?428]nm. The critical micelle concentration of cetyltrimethylammonium bromide was obtained from the inflection in the curve and was found to be 0.76 mM which agrees with the reported value. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01