Lipid-similar Thermal Transition of Polyethylene Glycol Alkyl Ether Detergents

Grell, Ernst; Lewitzki, Erwin; von Raumer, M.; Hörmann, A.

doi:10.1023/A:1010158312153

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Lipid-similar Thermal Transition of Polyethylene Glycol Alkyl Ether Detergents

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Grell, Ernst
Department of Biophysical Chemistry, Max Planck Institute of Biophysics, Max Planck Society;

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Lewitzki, Erwin
Department of Biophysical Chemistry, Max Planck Institute of Biophysics, Max Planck Society;

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Citation

Grell, E., Lewitzki, E., von Raumer, M., & Hörmann, A. (1999). Lipid-similar Thermal Transition of Polyethylene Glycol Alkyl Ether Detergents. Journal of Thermal Analysis and Calorimetry, 57(1), 371-375. doi:10.1023/A:1010158312153.

Cite as: https://hdl.handle.net/21.11116/0000-0007-EB97-6

Abstract

A narrow, reversible endothermic main transition is found in the aqueous micellar phase of octaethylene glycol tetradecyl ether (C₁₄E₈) by DSC, characterized by a transition temperature of 41°C and a ΔH value of 0.5 kcal mol⁻¹, which is not observed by light scattering. This transition is assigned to a cooperative conformational rearrangement of the assembled amphiphilic detergent molecules and not to a micelle aggregation process. It is suggested that the detergent’s polar head group is primarily involved in this rearrangement.