"Bicontinuous Cubic" Liquid Crystalline Materials from Discotic Molecules: A Special Effect of Paraffinic Side Chains with Ionic Liquid Pendants

被引：91

作者：

Alam, Md. Akhtarul ^{[6
]}

Motoyanagi, Jin ^{[6
]}

Yamamoto, Yohei ^{[6
]}

Fukushima, Takanori ^{[1
,2
]}

Kim, Jungeun ^{[3
]}

Kato, Kenichi ^{[4
]}

Takata, Masaki ^{[3
,4
]}

Saeki, Akinori ^{[5
]}

Seki, Shu ^{[5
]}

Tagawa, Seiichi ^{[5
]}

Aida, Takuzo ^{[1
,2
,6
]}

机构：

[1] Univ Tokyo, Dept Chem & Biotechnol, Sch Engn, Bunkyo Ku, Tokyo 1138656, Japan

[2] RIKEN, Adv Sci Inst, Wako, Saitama 3510198, Japan

[3] Japan Synchrotron Radiat Res Inst JASRI, Sayo, Hyogo 6795198, Japan

[4] RIKEN, SPring8 Ctr, Sayo, Hyogo 6795148, Japan

[5] Osaka Univ, Inst Sci & Ind Res, Osaka 5670047, Japan

[6] Japan Sci & Technol Agcy, ERATO SORST Nanospace Project, Koto Ku, Tokyo 1350064, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 49期

关键词：

TRANSITION-METAL-COMPLEXES; UNIFORM HOMEOTROPIC ALIGNMENT; ELECTRONICS; MESOPHASE;

D O I：

10.1021/ja905373d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

(Chemical Equation Presented) Triphenylene (TP) derivatives bearing appropriate paraffinic side chains with imidazolium ion-based ionic liquid (IL) pendants were unveiled to display a phase diagram with liquid crystalline (LC) mesophases of bicontinuous cubic (Cubbi) and hexagonal columnar (Colh) geometries. While their phase transition behaviors are highly dependent on the length of the side chains and the size of the ionic liquid pendants, TPs with hexadecyl side chains exclusively form a Cubbi LC assembly over an extremely wide temperature range of ∼200°C from room temperature when the anions of the IL pendants are relatively small. Wide-angle X-ray diffraction analysis suggested that the Cubbi LC mesophase contains D-stacked columnar TP arrays with a plane-to-plane separation of ∼3.5 Å. Consistently, upon laser flash photolysis, it showed a transient microwave conductivity comparable to that of a Colh LC reference. © 2009 American Chemical Society.

引用

页码：17722 / 17723

页数：2

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