Title

Synthesis And Mesomorphic Properties Of Α-Methylstilbene-Based Liquid Crystals

Keywords

α-methylstilbene liquid crystals; High birefringence; Isothiocyanato liquid crystals

Abstract

Six series of α-methylstilbene-based liquid crystals, i.e. 4-(4-alkylphenyl)-4'-amino-α-methylstilbenes (2a-e), 4-(4-alkylphenyl)-4'-cyano-α-methylstilbenes (3a-e), 4-(4-alkylphenyl)-4'-isothiocyanato-α-methylstilbenes (4a-e), 4'-(trans-4-alkylcyclohexyl)-4-fluoro-α-methylstilbenes (5a-e), 4'-(trans-4-alkylcyclohexyl)-4-amino-α-methylstilbenes (7a-e) and 4'-(trans-4-alkylcyclohexyl)-4-isothiocyanato-α-methylstilbenes (8a-e) were synthesised. All of these α-methylstilbene-based compounds exhibit an enantiotropic nematic phase. Some of the 4-(4-alkylphenyl)-4'-isothiocyanato-α-methylstilbenes with longer alkyl chains exhibit a smectic A phase. All of the liquid crystals obtained exhibit a wide nematic range and high birefringence of 0.16-0.46. Both series of isothiocyanato-based, liquid crystal compounds 4a-e and 8a-e containing α-methylstilbenes revealed much lower melting points and clearing temperatures than their cyano and amino homologues. © 2009 Taylor & Francis.

Publication Date

12-1-2009

Publication Title

Liquid Crystals

Volume

36

Issue

4

Number of Pages

425-433

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1080/02678290902927536

Socpus ID

84864099047 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84864099047

This document is currently not available here.

Share

COinS