疏水性碳水化合物聚合物的合成及其热致液晶相的形成。
Synthesis of Hydrophobic Carbohydrate Polymers and Their Formation of Thermotropic Liquid Crystalline Phases.
作者信息
Ghobril Cynthia, Heinrich Benoît, Dane Eric L, Grinstaff Mark W
机构信息
Departments of Chemistry and Biomedical Engineering, Boston University , Boston, Massachusetts 02215, United States.
Institut de Physique et Chimie des Matériaux de Strasbourg, UMR CNRS UdS 7504 , 23 rue du Loess, BP 43, 67034 Strasbourg Cedex 2, France.
出版信息
ACS Macro Lett. 2014 Apr 15;3(4):359-363. doi: 10.1021/mz5000703. Epub 2014 Mar 27.
The first synthesis of enantiopure glucose octyl ether polyamido-saccharides (GOE-PAS) with a defined molecular weight and narrow dispersity is reported using a controlled anionic ring-opening polymerization of a glucose-derived β-lactam sugar monomer possessing octyl ether chains. This new polymer structure is characterized by NMR, infrared (IR), optical rotation, gel permeation chromatography (GPC), and thermogravimetric analysis (TGA). At room temperature, the polymers form lamellar (Lam) phases. Upon heating to mild temperatures (ca. 60 °C), the shortest polymer shows a direct transition to the isotropic (Iso) liquid state, while the longer polymers give rise to a hexagonal columnar (Col) phase before becoming isotropic at higher temperatures (ca. 120 °C).
报道了通过具有辛基醚链的葡萄糖衍生的β-内酰胺糖单体的可控阴离子开环聚合，首次合成了具有确定分子量和窄分散度的对映体纯葡萄糖辛基醚聚酰胺糖（GOE-PAS）。这种新的聚合物结构通过核磁共振（NMR）、红外（IR）、旋光、凝胶渗透色谱（GPC）和热重分析（TGA）进行表征。在室温下，聚合物形成层状（Lam）相。加热到温和温度（约60℃）时，最短的聚合物直接转变为各向同性（Iso）液态，而较长的聚合物在较高温度（约120℃）变为各向同性之前会产生六方柱状（Col）相。
Zotero 插件