Determination of Critical Micelle Concentration by Hyper-Rayleigh Scattering

Ghosh, Suhrit ; Krishnan, Anu ; Das, Puspendu K. ; Ramakrishnan, S. (2003) Determination of Critical Micelle Concentration by Hyper-Rayleigh Scattering Journal of the American Chemical Society, 125 (6). pp. 1602-1606. ISSN 0002-7863

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Official URL: http://doi.org/10.1021/ja029070r

Related URL: http://dx.doi.org/10.1021/ja029070r

Abstract

The critical micelle concentration (CMC) of several surfactants that contain an NLO chromophore, either at the hydrocarbon tail, or at the hydrophilic headgroup, or even as a counterion, was determined by hyper-Rayleigh scattering (HRS). In all cases, the HRS signal exhibited a similar variation with surfactant concentration, wherein the CMC is inferred from a rather unprecedented drop in the signal intensity. This drop is attributed to the formation of small pre-micellar aggregates, whose concentrations become negligible above CMC. In addition, a probe molecule, which upon protonation yielded a species with significantly enhanced HRS intensity, was developed and its utility for the determination of the CMC of simple fatty acids was demonstrated.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society
ID Code:126257
Deposited On:17 Oct 2022 11:45
Last Modified:17 Oct 2022 11:45

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