Thermotropic columnar mesophases of wedge-shaped benzenesulfonic acid mesogens

被引：39

作者：

Beginn, Uwe ^{[1
]}

Yan, Linglong ^{[2
,3
]}

Chvalun, Sergei N. ^{[4
]}

Shcherbina, Maxim A. ^{[4
]}

Bakirov, Artem ^{[4
]}

Moeller, Martin ^{[2
,3
]}

机构：

[1] Univ Osnabruck, Inst Chem, D-49069 Osnabruck, Germany

[2] Rhein Westfal TH Aachen, Inst Tech & Macromol Chem, D-52056 Aachen, Germany

[3] DWI eV, D-52056 Aachen, Germany

[4] LY Karpov Phys Chem Res Inst, Moscow 103064, Russia

来源：

LIQUID CRYSTALS | 2008年 / 35卷 / 09期

关键词：

columnar mesophases; wedge-shaped sulfonate amphiphiles; cunitic molecules;

D O I：

10.1080/02678290802376107

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The synthesis and characterisation are reported of two groups of new amphiphilic sulfonate compounds, 2,3,4-tris(dodecyloxy)benzenesulfonates, 2,3,4-tris(dodecyloxy)benzenesulfonamide and the isomeric 3,4,5-tris(dodecyloxy)benzenesulfonates. As revealed by a combination of thermo-optical microscopy, differential scanning calorimetry and X-ray scattering techniques, the occurrence of mesophases is controlled by the radius of the cation and the symmetry of the molecule. The sulfonates exhibited a rich phase behaviour involving cubic, ordered and disordered columnar mesophases, depending on the counter ion and the type of substitution. It is proposed that the term 'cunitic' molecules should be introduced as a class descriptor for wedge-shaped molecules and their columnar phases.

引用

页码：1073 / 1093

页数：21

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