Supramolecular thermotropic liquid crystalline materials with nematic mesophase based on methylated hyperbranched polyethylenimine and mesogenic carboxylic acid

被引：25

作者：

Chen, Y

Shen, Z

Gehringer, L

Frey, H

Stiriba, SE

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Organ Chem, D-55099 Mainz, Germany

[2] Tianjin Univ, Dept Chem, Tianjin 300072, Peoples R China

[3] Univ Valencia, ICMOL, E-46100 Valencia, Spain

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 2006年 / 27卷 / 01期

关键词：

dendrimers; hyperbranched; mesogen carboxylic acid; nematic phase; polyethylenimine; SAXS; self-assembly; supramolecular liquid crystal;

D O I：

10.1002/marc.200500628

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理]; 080501 [材料物理与化学]; 081704 [应用化学];

摘要：

Supramolecular interaction of fully methylated hyperbranched polyethylenimines (PEI) with a mesolgen-based carboxylic acid, 5-(p-cyanobiphenoxy)pentanoic acid, results in the formation of supramolecular complexes exhibiting thermotropic liquid crystalline (LC) mesophases. In contrast to the common smectic mesophases of most dendritic LC polymers, nematic LC phases were observed. The complexation of PEI and the mesogen units is due to electrostatic interaction between the carboxylate groups and the ammonium end groups of PEI. LC properties were investigated by a combination of differential scanning calorimetry, polarizing light optical microscopy, and X-ray diffractometry.

引用

页码：69 / 75

页数：7

共 63 条

[1]

Ambrozic G, 2000, MACROMOL RAPID COMM, V21, P53, DOI 10.1002/(SICI)1521-3927(20000101)21:1<53::AID-MARC53>3.0.CO

[2]

2-1

[3]

Hybrids of silver nanoparticles with amphiphilic hyperbranched macromolecules exhibiting antimicrobial properties [J].