Shape Dependence in the Formation of Condensed Phases Exhibited by Disubstituted Sucrose Esters
作者:Valérie Molinier、Paul J. J. Kouwer、Juliette Fitremann、Alain Bouchu、Grahame Mackenzie、Yves Queneau、John W. Goodby
DOI:10.1002/chem.200600368
日期:2007.2.12
We report on the self-organizing properties of sucrose esters that are di-(1',6', 1',6, and 6,6')-substituted with aliphatic chains of identical or different chain lengths and levels of saturation. For the materials possessing two saturated aliphatic chains, the compounds exhibited thermotropic lamellar smectic A phases. A remarkable new phase transition was observed for the di-octadecanoyl homologue
我们报告了被相同或不同链长和饱和度的脂族链二(1',6',1',6和6,6')取代的蔗糖酯的自组织特性。对于具有两个饱和脂族链的材料,该化合物表现出热致性层状近晶A相。对于二十八烷酰基同系物观察到了显着的新相变,其中一个层列A相转变为另一层,层间距连续变化,但相关长度不连续变化。较长的顺式不饱和链的引入导致链的横截面积相对于蔗糖头基增加,因此观察到柱状相。