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Tailoring Discotic Mesophases: Columnar Order Enforced with Hydrogen Bonds
Author(s) -
Gearba R.I.,
Lehmann M.,
Levin J.,
Ivanov D.A.,
Koch M.H.J.,
Barberá J.,
Debije M.G.,
Piris J.,
Geerts Y.H.
Publication year - 2003
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200305137
Subject(s) - mesophase , discotic liquid crystal , materials science , stacking , columnar phase , crystallography , hydrogen bond , hexagonal crystal system , liquid crystal , derivative (finance) , molecule , organic chemistry , optoelectronics , chemistry , financial economics , economics
Hydrogen bonding can be used to significantly enforce the intra‐columnar stacking order in discotic mesogens. The ordered hexagonal columnar mesophase of a HAT‐CONHR derivative is characterized by the smallest inter‐disk distance ever found in columnar liquid crystals (3.18–3.20 Å). This additional attractive interaction between the disks in the column results in a regular disc stacking and thus in a high charge‐carrier mobility over the whole investigated temperature range (from room temperature up to 200 °C).