Archaeal cyclopentane fragment in a surfactant's hydrophobic tail decreases the Krafft point.,Soft Matter

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Archaeal cyclopentane fragment in a surfactant's hydrophobic tail decreases the Krafft point.
Soft Matter ( IF 2.9 ) Pub Date : 2020-01-14 , DOI: 10.1039/c9sm02000d
Konstantin S Mineev ₁ , Pavel E Volynsky , Timur R Galimzyanov , Daria S Tretiakova , Mikhail Y Bobrov , Anna S Alekseeva , Ivan A Boldyrev

Affiliation

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.

中文翻译：

表面活性剂疏水尾中的古细菌环戊烷片段会降低Krafft点。

古细菌是原核微生物，以其适应极端环境（包括低温和高温）的能力而闻名。初生脂质通常是具有两个极性头部和一个疏水核的大环，该疏水核包含甲基和在线循环。在这里，我们介绍了继承了古细菌脂质特征的新型通用表面活性剂的设计。这些是含有直链环戊烷的C12和C14羧酸。环戊烷扰乱了链的堆积，这导致表面活性剂进入低温区域的操作范围显着扩大。我们报告了这些新型古细菌类表面活性剂的合成和性能，以及从热力学模型预测，分子动力学模拟以及CMC和Krafft点的实验数据得出的链状堆积细节。

更新日期：2020-02-13

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