树状碳水化合物Ⅱ——液晶性的研究

摘要

以基于单糖为内核,楔形液晶基元DOBOB酸（3,4,5-三[对-（十二烷氧基）苄氧基]苯甲酸）为分枝的树状碳水化合物液晶为研究对象,利用DSC、热台偏光显微镜、XRD和CD/UV光谱等手段研究该类化合物的液晶性.研究发现分枝的数目对该类化合物的液晶性有显著影响,以2-乙酰氨基葡萄糖为内核的包含四个分枝的树状分子具有最高的液晶结构有序性,清亮点也显著高于另两种单糖内核（含五个分枝）的树状分子.此外,该类碳水化合物液晶形成的液晶相都具备超分子手性,为探索碳水化合物手性液晶相提供了一条新的思路.%Liquid crystallinity of dendronized carbohydrate liquid crystals,which contain carbohydrate core and mesogen branches DOBOB（3,4,5-tris（p-dodecyloxybenzyloxy） benzoic acid）,was studied by DSC,thermal polarized optical microscopy,XRD and CD/UV spectrum.The number of branches affects the liq-uid crystallinity significantly.Dendrimer that contains four branches has the highest liquid crystal structure order,and the clearing point is also higher than the other two dendrimers which contain five branches.Oth-erwise,supramolecular chirality is also expressed in the mesophase formed by these dendronized carbohy-drates,which may provide inspiration in searching for chiral mesophase of carbohydrate liquid crystals.