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Synthesis and structure-property relationships of amphiphilic organogelators

机译：两亲性有机胶凝剂的合成与结构-性质关系

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摘要

A series of low-molecular-weight amphiphilic molecules was synthesized and investigated for their ability to gel organic solvents. These amphiphilic molecules are composed of a head-group moiety capable of forming intermolecular associations through hydrogen bonds and n-alkyl chains of various lengths. This paper describes the continuation of recently published work, in which this class of gelators was presented for the first time. Here, the focus addresses systematically three different structural variations of the head-group moiety: 1) the rigidity, 2) the type and strength of the hydrogen-bond-forming units, and 3) the reduction of the intermolecular interaction by incorporating a lateral substituent. The gelation behavior was investigated in p-xylene and in several polar solvents. The aim was to establish structure-property relationships and to provide organogelators capable of forming gels at low concentrations with adjustable sol-gel transition temperatures and good optical quality. For some individual compounds of the series this property profile was achieved. For the investigated solvents, with particular compounds, sol-gel transition temperatures above 100 degrees C with a reasonable concentration of gelator are obtainable.
机译：合成了一系列低分子量两亲分子，并研究了它们胶凝有机溶剂的能力。这些两亲性分子由能够通过氢键和各种长度的正烷基链形成分子间缔合的头基部分构成。本文描述了最近发表的工作的延续，其中首次出现了此类胶凝剂。在这里，焦点系统地解决了头基部分的三种不同的结构变化：1）刚性; 2）氢键形成单元的类型和强度; 3）通过结合侧基减少分子间相互作用取代基。在对二甲苯和几种极性溶剂中研究了凝胶行为。目的是建立结构-性质关系，并提供能够在低浓度下以可调节的溶胶-凝胶转变温度和良好的光学质量形成凝胶的有机胶凝剂。对于该系列的某些单独的化合物，实现了该特性曲线。对于所研究的溶剂，使用特定的化合物，可以获得100摄氏度以上且具有合理浓度的胶凝剂的溶胶凝胶转变温度。

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