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Polycatenar Mesogens with Various Degree of Flexibility of Molecular Structure
Author(s) -
Wolska Joanna M.,
Topnani Neha,
Gorecka Ewa,
Mieczkowski Jozef,
Pociecha Damian
Publication year - 2016
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201600330
Subject(s) - mesogen , liquid crystal , molecule , columnar phase , crystallography , materials science , phase (matter) , hexagonal crystal system , rigidity (electromagnetism) , fluorescence , crystal structure , chemical physics , liquid crystalline , chemistry , organic chemistry , optics , physics , optoelectronics , composite material
A series of newly synthesised rod‐like polycatenar mesogens forms columnar phases, with the number of molecules in the column cross section depending on the core rigidity. For non‐symmetric molecules, an additional density modulation, namely helical arrangement of molecules with a periodicity of approximately 10 molecular distances develops along the columns. For one of the compounds, a new type of columnar liquid crystal phase with 3D positional order is observed. Introducing a stilbene unit in the mesogenic core enhances the fluorescent properties of the compounds. In the hexagonal columnar phase, polarised light emission is observed.