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Synthesis of Novel Liquid‐Crystalline Allene Derivatives with Ferroelectric Properties
Author(s) -
StichlerBonaparte Jürgen,
Kruth Holger,
Lunkwitz Ralph,
Tschierske Carsten
Publication year - 1996
Publication title -
liebigs annalen
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 0947-3440
DOI - 10.1002/jlac.199619960906
Subject(s) - allene , ferroelectricity , chemistry , differential scanning calorimetry , enantioselective synthesis , liquid crystalline , phase (matter) , liquid crystal , polarized light microscopy , crystallography , organic chemistry , catalysis , materials science , optics , dielectric , optoelectronics , physics , thermodynamics
Some new heterocyclic liquid‐crystalline compounds incorporating a 1,3‐disubstituted allene unit were synthesised. These axial‐chiral compounds were investigated by polarisation microscopy and differential scanning calorimetry. One of them was also synthesised in enantiomerically enriched form by enantioselective synthesis. It was found that the latter product exhibits a ferroelectric switchable chiral smectic C phase with an unexpectedly large value of the spontaneous polarisation.