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Archaeal cyclopentane fragment in a surfactant's hydrophobic tail decreases the Krafft point
Pavel E. Volynsky
Soft Matter Pub Date : 12/19/2019 00:00:00 , DOI:10.1039/C9SM02000D
Abstract

Archaea are prokaryotic microorganisms famous for their ability to adapt to extreme environments, including low and high temperatures. Archaeal lipids often are macrocycles with two polar heads and a hydrophobic core that contains methyl groups and in-line cycles. Here we present the design of novel general-purpose surfactants that have inherited features of archaeal lipids. These are C12 and C14 carboxylic acids containing in-line cyclopentanes. The cyclopentanes disturb the chain packing, which results in remarkable expansion of the operational range of the surfactant into the low-temperature region. We report synthesis and properties of these novel archaea-like surfactants and details of their chain packing derived from thermodynamics model predictions, molecular dynamics simulations, and experimental data on CMC and Krafft points.

Graphical abstract: Archaeal cyclopentane fragment in a surfactant's hydrophobic tail decreases the Krafft point
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