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首页> 外文期刊>Crystal growth & design >Secondary ammonium dicarboxylate (SAD) - A supramolecular synthon in designing low molecular weight gelators derived from azo-dicarboxylates
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Secondary ammonium dicarboxylate (SAD) - A supramolecular synthon in designing low molecular weight gelators derived from azo-dicarboxylates

机译:仲二羧酸铵(SAD)-超分子合成子,用于设计由偶氮二羧酸酯衍生的低分子量胶凝剂

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摘要

The supramolecular synthon namely secondary ammonium dicarboxylate (SAD) synthon has been exploited to design a new series of low molecular weight gelators (LMWGs) derived from azobenzene-4,4′-dicarboxylic acid and azobenzene-4,4′-diacrylic acid, and various secondary amines. Single crystal structures of six such salts exclusively established the presence of SAD synthon. Two such salts namely, dicyclohexylammonium azobenzene-4,4′- diacrylate (2.DCHA) and dihexylammonium azobenzene-4,4′-diacrylate (2.DHA) displayed intriguing gelation properties. Powder X-ray diffraction in combination with single crystal X-ray data established existence of SAD synthon in the structure of the gel network of 2.DCHA. UV-irradiation of the salts as well as the gel did not show any trans-cis isomerization of the azo-moiety.
机译:超分子合成子即仲羧酸二铵(SAD)合成子已被用于设计一系列新的低分子量胶凝剂(LMWG),它们衍生自偶氮苯-4,4'-二羧酸和偶氮苯-4,4'-二丙烯酸,以及各种仲胺。六种此类盐的单晶结构专门确定了SAD合成子的存在。两种盐,即偶氮二环己基铵-4,4'-二丙烯酸酯(2.DCHA)和偶氮二己基四胺-4,4'-二丙烯酸酯(2.DHA)显示出令人着迷的胶凝性能。粉末X射线衍射结合单晶X射线数据建立了2.DCHA凝胶网络结构中SAD合成子的存在。盐和凝胶的UV-辐照没有显示出偶氮部分的任何反式-顺式异构化。

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