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Issue 14, 2017
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Partitioning of 2-phenylethanol and limonene cosurfactants in C12E4

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Abstract

Avoided level-crossing muon spin resonance (ALC-μSR) has been used to study the dynamics and local environment of spin probes formed by muonium (Mu) addition to 2-phenylethanol (PEA) and limonene (1-methyl-4-(1-methylethenyl)-cyclohexene) in an aqueous dispersion of the nonionic surfactant C12E4 (tetra(ethylene glycol) n-dodecyl ether). The spin probes derived from both cosurfactants reside within the micelles in the L1 phase and the bilayers in the Lα phase rather than in the aqueous region. The local polarity measured by the different isomers of the Mu adducts of PEA suggests there is a water gradient within the micelles and bilayers. Slow rotation of the micelles broadened the Δ1 resonances with increasing temperature in the L1 phase while narrower Δ1 resonances were observed in the Lα phase due to the rapid rotation of the spin probes around a preferred axis, which was wobbling within a cone.

Graphical abstract: Partitioning of 2-phenylethanol and limonene cosurfactants in C12E4

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Article information


Submitted
30 Jan 2017
Accepted
20 Mar 2017
First published
27 Mar 2017

Phys. Chem. Chem. Phys., 2017,19, 9551-9557
Article type
Paper

Partitioning of 2-phenylethanol and limonene cosurfactants in C12E4

I. McKenzie, R. Scheuermann and I. Tucker, Phys. Chem. Chem. Phys., 2017, 19, 9551
DOI: 10.1039/C7CP00668C

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