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A Twist‐Bend Nematic (N TB ) Phase of Chiral Materials
Author(s) -
Gorecka Ewa,
Vaupotič Nataša,
Zep Anna,
Pociecha Damian,
Yoshioka Jun,
Yamamoto Jun,
Takezoe Hideo
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201502440
Subject(s) - mesogen , liquid crystal , twist , bent molecular geometry , phase (matter) , crystallography , materials science , chemistry , liquid crystalline , organic chemistry , composite material , geometry , optoelectronics , mathematics
New chiral dimers consisting of a rod‐like and cholesterol mesogenic units are reported to form a chiral twist‐bend nematic phase (N TB *) with heliconical structure. The compressibility of the N TB phase made of bent dimers was found to be as large as in smectic phases, which is consistent with the nanoperiodic structure of the N TB phase. The atomic force microscopy observations in chiral bent dimers revealed a periodicity of about 50 nm, which is significantly larger than the one reported previously for non‐chiral compounds (ca. 10 nm).