Carbosilane liquid crystalline dendrimers with terminal chiral mesogenic groups: Structure and properties

X. M. Zhu; N. I. Boiko; E. A. Rebrov; A. M. Muzafarov; M. V. Kozlovsky; R. M. Richardson; V. P. Shibaev

doi:10.1080/02678290110039507

Carbosilane liquid crystalline dendrimers with terminal chiral mesogenic groups: Structure and properties

X. M. Zhu, N. I. Boiko, E. A. Rebrov, A. M. Muzafarov, M. V. Kozlovsky, R. M. Richardson, V. P. Shibaev^*

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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Abstract

This paper presents a systematic study of two series of carbosilane liquid crystalline (LC) dendrimers from first to fifth generations bearing 8, 16, 32, 64 and 128 terminal chiral mesogenic groups, respectively. All the LC dendrimers synthesized are characterized by the same glass transition temperature around -5°C. It has been shown that the LC dendrimers of the lower generations (G-1-G-3) form a ferroelectric SmC* phase over a very broad temperature range up to about 180°C, while the LC dendrimers of the higher generations (G-4 and G-5) display a rectangular columnar mesophase (Col_r). Schemes of packing in the SmC* and Col_r mesophases formed by the LC dendrimers are suggested and discussed. Electrical measurements on the ferroelectric LC dendrimers have shown that an increase in generation number leads to a decrease in the value of the spontaneous polarization and an increase in switching time.

Original language	English
Pages (from-to)	1259-1268
Number of pages	10
Journal	Liquid Crystals
Volume	28
Issue number	8
DOIs	https://doi.org/10.1080/02678290110039507
Publication status	Published - 1 Aug 2001

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@article{85020909e1a447b0b001350331d01a7c,

title = "Carbosilane liquid crystalline dendrimers with terminal chiral mesogenic groups: Structure and properties",

abstract = "This paper presents a systematic study of two series of carbosilane liquid crystalline (LC) dendrimers from first to fifth generations bearing 8, 16, 32, 64 and 128 terminal chiral mesogenic groups, respectively. All the LC dendrimers synthesized are characterized by the same glass transition temperature around -5°C. It has been shown that the LC dendrimers of the lower generations (G-1-G-3) form a ferroelectric SmC* phase over a very broad temperature range up to about 180°C, while the LC dendrimers of the higher generations (G-4 and G-5) display a rectangular columnar mesophase (Colr). Schemes of packing in the SmC* and Colr mesophases formed by the LC dendrimers are suggested and discussed. Electrical measurements on the ferroelectric LC dendrimers have shown that an increase in generation number leads to a decrease in the value of the spontaneous polarization and an increase in switching time.",

author = "Zhu, {X. M.} and Boiko, {N. I.} and Rebrov, {E. A.} and Muzafarov, {A. M.} and Kozlovsky, {M. V.} and Richardson, {R. M.} and Shibaev, {V. P.}",

year = "2001",

month = aug,

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doi = "10.1080/02678290110039507",

language = "English",

volume = "28",

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journal = "Liquid Crystals",

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TY - JOUR

T1 - Carbosilane liquid crystalline dendrimers with terminal chiral mesogenic groups

T2 - Structure and properties

AU - Zhu, X. M.

AU - Boiko, N. I.

AU - Rebrov, E. A.

AU - Muzafarov, A. M.

AU - Kozlovsky, M. V.

AU - Richardson, R. M.

AU - Shibaev, V. P.

PY - 2001/8/1

Y1 - 2001/8/1

N2 - This paper presents a systematic study of two series of carbosilane liquid crystalline (LC) dendrimers from first to fifth generations bearing 8, 16, 32, 64 and 128 terminal chiral mesogenic groups, respectively. All the LC dendrimers synthesized are characterized by the same glass transition temperature around -5°C. It has been shown that the LC dendrimers of the lower generations (G-1-G-3) form a ferroelectric SmC* phase over a very broad temperature range up to about 180°C, while the LC dendrimers of the higher generations (G-4 and G-5) display a rectangular columnar mesophase (Colr). Schemes of packing in the SmC* and Colr mesophases formed by the LC dendrimers are suggested and discussed. Electrical measurements on the ferroelectric LC dendrimers have shown that an increase in generation number leads to a decrease in the value of the spontaneous polarization and an increase in switching time.

AB - This paper presents a systematic study of two series of carbosilane liquid crystalline (LC) dendrimers from first to fifth generations bearing 8, 16, 32, 64 and 128 terminal chiral mesogenic groups, respectively. All the LC dendrimers synthesized are characterized by the same glass transition temperature around -5°C. It has been shown that the LC dendrimers of the lower generations (G-1-G-3) form a ferroelectric SmC* phase over a very broad temperature range up to about 180°C, while the LC dendrimers of the higher generations (G-4 and G-5) display a rectangular columnar mesophase (Colr). Schemes of packing in the SmC* and Colr mesophases formed by the LC dendrimers are suggested and discussed. Electrical measurements on the ferroelectric LC dendrimers have shown that an increase in generation number leads to a decrease in the value of the spontaneous polarization and an increase in switching time.

UR - http://www.scopus.com/inward/record.url?scp=0034913449&partnerID=8YFLogxK

U2 - 10.1080/02678290110039507

DO - 10.1080/02678290110039507

M3 - Article (Academic Journal)

AN - SCOPUS:0034913449

VL - 28

SP - 1259

EP - 1268

JO - Liquid Crystals

JF - Liquid Crystals

SN - 0267-8292

IS - 8

ER -

Carbosilane liquid crystalline dendrimers with terminal chiral mesogenic groups: Structure and properties

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