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 journalArticle (Academic Journal)

16 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1259-1268
Number of pages10
JournalLiquid Crystals
Volume28
Issue number8
DOIs
Publication statusPublished - 1 Aug 2001

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    Zhu, X. M., Boiko, N. I., Rebrov, E. A., Muzafarov, A. M., Kozlovsky, M. V., Richardson, R. M., & Shibaev, V. P. (2001). Carbosilane liquid crystalline dendrimers with terminal chiral mesogenic groups: Structure and properties. Liquid Crystals, 28(8), 1259-1268. https://doi.org/10.1080/02678290110039507