SmA-SmC-B2 polymorphism in an achiral cyano substituted banana-shaped mesogen

被引：55

作者：

Weissflog, W ^{[1
]}

Kovalenko, L ^{[1
]}

Wirth, I ^{[1
]}

Diele, S ^{[1
]}

Pelzl, G ^{[1
]}

Schmalfuss, H ^{[1
]}

Kresse, H ^{[1
]}

机构：

[1] Univ Halle Wittenberg, Inst Phys Chem, D-06108 Halle, Germany

来源：

LIQUID CRYSTALS | 2000年 / 27卷 / 05期

关键词：

D O I：

10.1080/026782900202543

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new achiral five-ring banana-shaped mesogen is presented which has a cyano substituent in the 4-position of the central core. Microscopical, X-ray, dielectric and electro-optical investigations give evidence for the unusual phase sequence B-2, SmC, SmA. The B-2 phase shows an antiferroelectric switching behaviour; the spontaneous polarization was found to be 330 nC cm(-2).

引用

页码：677 / 681

页数：5

共 21 条

[1] Calorimetric and dielectric investigations of smectic liquid crystals with aerosil [J].

Abd-El-Messieh, SL ;

Werner, J ;

Schmalfuss, H ;

Weissflog, W ;

Kresse, H .

LIQUID CRYSTALS, 1999, 26 (04) :535-539

[2]

BEDEL JP, 1999, MOL CRYST LIQ CRYST, V332, P163

[3] Structure and properties of liquid crystalline phases formed by achiral banana-shaped molecules [J].

Diele, S ;

Grande, S ;

Kruth, H ;

Lischka, CH ;

Pelzi, G ;

Weissflog, W ;

Wirth, I .

FERROELECTRICS, 1998, 212 (1-4) :169-177

[4]

DIELE S, 1999, LIQ CRYST TODAY, V9, P8, DOI DOI 10.1080/13583149908047573

[5]

HAUSER A, IN PRESS LIQ CRYST

[6]

HEPPKE G, 1999, FREIB ARB

[7]

HEPPKE G, 1997, FREIB ARB

[8] First observation of double-twisted helical structure in a banana-shaped achiral molecule [J].

Lee, CK ;

Chien, LC .

LIQUID CRYSTALS, 1999, 26 (04) :609-612

[9]

MARCUS E, 1891, CHEM BER, V24, P3650

[10] Mesomorphic and electro-optical properties of new achiral banana-shaped molecules [J].

Nguyen, HT ;

Rouillon, JC ;

Marcerou, JP ;

Bedel, JP ;

Barois, P ;

Sarmento, S .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1999, 328 :177-184

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