title: A Columnar Liquid-Crystal Phase Formed by Hydrogen-Bonded Perylene Bisimide J-Aggregates.
abstract: A new perylene bisimide (PBI) dye self-assembles through hydrogen bonds and π-π interactions into J-aggregates that in turn self-organize into liquid-crystalline (LC) columnar hexagonal domains. The PBI cores are organized with the transition dipole moments parallel to the columnar axis, which is an unprecedented structural organization in π-conjugated columnar liquid crystals. Middle and wide-angle X-ray analyses reveal a helical structure consisting of three self-assembled hydrogen-bonded PBI strands that constitute a single column of the columnar hexagonal phase. This remarkable assembly mode for columnar liquid crystals may afford new anisotropic LC materials for applications in photonics.
authors.affiliation: Universität Würzburg, Institut für Organische Chemie, Am Hubland, 97074, Würzburg, Germany.
authors.forename: Stefanie
authors.initials: S
authors.lastname: Herbst
authors.affiliation: Center for Nanosystems Chemistry & Bavarian Polymer Institute (BPI), Theodor-Boveri-Weg, 97074, Würzburg, Germany.
authors.forename: Bartolome
authors.identifier: 0000-0003-2128-6602
authors.initials: B
authors.lastname: Soberats
authors.affiliation: Universität Würzburg, Institut für Organische Chemie, Am Hubland, 97074, Würzburg, Germany.
authors.forename: Pawaret
authors.initials: P
authors.lastname: Leowanawat
authors.affiliation: Universität Würzburg, Institut für Organische Chemie, Am Hubland, 97074, Würzburg, Germany.|Center for Nanosystems Chemistry & Bavarian Polymer Institute (BPI), Theodor-Boveri-Weg, 97074, Würzburg, Germany.
authors.forename: Matthias
authors.identifier: 0000-0002-2903-7101
authors.initials: M
authors.lastname: Lehmann
authors.affiliation: Universität Würzburg, Institut für Organische Chemie, Am Hubland, 97074, Würzburg, Germany.|Center for Nanosystems Chemistry & Bavarian Polymer Institute (BPI), Theodor-Boveri-Weg, 97074, Würzburg, Germany.
authors.forename: Frank
authors.identifier: 0000-0001-7245-0471
authors.initials: F
authors.lastname: Würthner
keywords: J-aggregates; anisotropic materials; liquid crystals; perylene bisimide; self-assembly