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. A perylene bisimide dye self-assembles via hydrogen-bonding and π–π interactions into J-aggregates, which in turn organize into liquid-crystalline columnar domains. The dye molecules organize with the cores parallel to the columnar axis, forming an unprecedented triple stranded helical structure with transition dipoles μag pointing along the columnar axis.

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interactions anisotropic lc materials dipoles ag cores hydrogenbonded pbi hydrogen bonds stranded helical dipole liquidcrystalline columnar hydrogenbonding

Pawaret Leowanawat,Stefanie Herbst, Bartolome Soberats, Matthias Lehmann, Frank Würthner,.A Columnar Liquid-Crystal Phase Formed by Hydrogen-Bonded Perylene Bisimide J-Aggregates. 56 (5),.

Pawaret Leowanawat, et al."A Columnar Liquid-Crystal Phase Formed by Hydrogen-Bonded Perylene Bisimide J-Aggregates" 56

Pawaret Leowanawat,Stefanie Herbst, Bartolome Soberats, Matthias Lehmann, Frank Würthner,"A Columnar Liquid-Crystal Phase Formed by Hydrogen-Bonded Perylene Bisimide J-Aggregates"