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Cover Picture: Truxene‐Based Columnar Liquid Crystals: Self‐Assembled Structures and Electro‐Active Properties (Chem. Asian J. 10/2009)
Author(s) -
Isoda Kyosuke,
Yasuda Takuma,
Kato Takashi
Publication year - 2009
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.200990033
Subject(s) - conjugated system , dipole , intermolecular force , cyclic voltammetry , alkyl , crystallography , liquid crystal , molecule , self assembly , perpendicular , materials science , chemistry , polymer , nanotechnology , electrochemistry , organic chemistry , optoelectronics , electrode , geometry , mathematics
Columnar liquid‐crystalline (LC) truxene derivatives containing branched flexible alkyl chains have been designed and synthesized by T. Kato et al. The dicyanomethylene and dithiafulvene substituents have been introduced into the π‐conjugated truxene framework to tune their electronic and redox properties as well as the molecular assembled structures. The π‐conjugated cores of dicyanomethylene‐ and dithiafulvene‐appended truxenes adopt bowl‐shaped conformations, giving rise to a large intrinsic dipole moment perpendicular to the aromatic framework. These molecules form stable columnar LC structures through intermolecular dipole–dipole interactions. The redox properties of LC truxene derivatives have been examined by cyclic voltammetry. For the details, turn to their Full Paper on page 1619 ff.