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Stabilization of the Columnar Mesophase of Perylenediimide by Racemic Triple Tails
Author(s) -
Pereira de Oliveira Santos Deise M.,
Belarmino Cabral Marilia G.,
Bentaleb Ahmed,
Cristiano Rodrigo,
Gallardo Hugo,
Durola Fabien,
Bock Harald
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201600438
Subject(s) - mesophase , materials science , crystallography , polymer science , polymer chemistry , liquid crystal , chemistry , optoelectronics
Whereas perylene tetracarboxdiimides derived from amino‐ n ‐alkanes if at all only show monotropic (thermodynamically unstable) mesogenic self‐assembly, the hexagonal columnar liquid crystalline state can be stabilized over a broad temperature range with doubly branched, doubly racemic alkyl residues. An improved tendency to homeotropic surface orientation is observed, and the orientation of the liquid crystalline domains is maintained upon cycling through the crystalline state at room temperature.