Design and characterization of hydrogen bonded ferroelectric liquid crystals: A study of light modulation in nematic and smectic orderings

被引：11

作者：

Vijayakumar, V. N. ^{[1
]}

Mohan, M. L. N. Madhu ^{[1
]}

机构：

[1] Bannari Amman Inst Technol, LCRL, Sathyamangalam 638401, India

来源：

OPTIK | 2012年 / 123卷 / 12期

关键词：

Liquid crystals; Chemical synthesis; Dielectric response; Field induced transition; STABILIZATION; DISTORTION;

D O I：

10.1016/j.ijleo.2011.07.028

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A novel series of hydrogen bonded ferroelectric liquid crystals (HBFLC) have been isolated. Phase transition temperatures obtained by differential scanning calorimetry (DSC) and textural observations elicited by polarizing optical microscope (ROM) studies are discussed. Phase diagram is constructed from the above data. Salient feature of the present work is observation of a light modulation due to field induced transitions (FiT) in nematic and smectic C* phases. Tilt angle measurements in various FiT of smectic C* phase are discussed. One of the mesogens in nematic phase behaves like an optical modulator; helical pitch measurements support the above observation. (C) 2011 Elsevier GmbH. All rights reserved.

引用

页码：1044 / 1050

页数：7

共 18 条

[1] ELECTRICALLY AND OPTICALLY CONTROLLED LIGHT-MODULATION AND COLOR SWITCHING USING HELIX DISTORTION OF FERROELECTRIC LIQUID-CRYSTALS [J].

ABDULHALIM, I ;

MODDEL, G .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1991, 200 :79-101

[2]

De Gennes P. G., 1974, The Physics of Liquid Crystals

[3]

Demus D., 1974, FLUSSIGE KRISTALLE T

[4]

GOODBY JW, 1991, FERRO ELECT LIQUID C

[5]

Gray G.W., 1962, Molecular Structure and the Properties of Liquid Crystals

[6]

Gray G.W., 1984, SMECTIC LIQUID CRYST

[7] NEW APPROACH TO MESOPHASE STABILIZATION THROUGH HYDROGEN-BONDING MOLECULAR-INTERACTIONS IN BINARY-MIXTURES [J].

KATO, T ;

FRECHET, JMJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1989, 111 (22) :8533-8534

[8]

Kato T., 1998, HDB LIQUID CRYSTALS, DOI DOI 10.1021/ma049195b

[9]

Kelker Hans., 1980, HDB LIQUID CRYSTALS

[10] FIELD-INDUCED SMECTIC-A TO SMECTIC-C TRANSITION IN FERROELECTRIC LIQUID-CRYSTALS WITH A CHIRAL GROUP ON EACH END OF THE CORE [J].

KOBAYASHI, S ;

ISHIBASHI, S .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1994, 257 :181-192

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