title: Effect of the ortho alkylation of perylene bisimides on the alignment and self-assembly properties.
abstract: The effect of the ortho alkylation of perylene bisimides on the alignment and self-assembly properties has been studied. It was found that the dichroic properties of perylene bisimides in a liquid crystal host can be reversed with a single synthetic step by ortho alkylation. Furthermore, a solvent-induced growth of ultralong organic n-type semiconducting fibrils from non-ortho-alkylated perylene bisimide was observed. Ortho substitution of the perylene bisimide core alters the mode of fibrillar growth, leading to isotropic crystallization.
authors.affiliation: Laboratory of Functional Organic Materials and Devices, Eindhoven University of Technology P.O. Box 513, 5600 MB, Eindhoven (The Netherlands) E-mail: a.p.h.j.schenning@tue.nl.
authors.forename: Debarshi
authors.initials: D
authors.lastname: Dasgupta
authors.affiliation: Laboratory of Functional Organic Materials and Devices, Eindhoven University of Technology P.O. Box 513, 5600 MB, Eindhoven (The Netherlands) E-mail: a.p.h.j.schenning@tue.nl.
authors.forename: Amol M
authors.initials: AM
authors.lastname: Kendhale
authors.affiliation: Laboratory of Functional Organic Materials and Devices, Eindhoven University of Technology P.O. Box 513, 5600 MB, Eindhoven (The Netherlands) E-mail: a.p.h.j.schenning@tue.nl.
authors.forename: Michael G
authors.initials: MG
authors.lastname: Debije
authors.affiliation: Laboratory of Functional Organic Materials and Devices, Eindhoven University of Technology P.O. Box 513, 5600 MB, Eindhoven (The Netherlands) E-mail: a.p.h.j.schenning@tue.nl.
authors.forename: Jeroen
authors.initials: J
authors.lastname: Ter Schiphorst
authors.affiliation: Laboratory of Functional Organic Materials and Devices, Eindhoven University of Technology P.O. Box 513, 5600 MB, Eindhoven (The Netherlands) E-mail: a.p.h.j.schenning@tue.nl.
authors.forename: Ivelina K
authors.initials: IK
authors.lastname: Shishmanova
authors.affiliation: Netherlands Organization for Scientific Research (NWO), European Synchrotron Radiation Facility (ESRF), DUBBLE-CRG Grenoble, 38043 (France).
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Portale
authors.affiliation: Laboratory of Functional Organic Materials and Devices, Eindhoven University of Technology P.O. Box 513, 5600 MB, Eindhoven (The Netherlands) E-mail: a.p.h.j.schenning@tue.nl ; Institute for Complex Molecular Systems, Eindhoven University of Technology P.O. Box 513, 5600 MB, Eindhoven (The Netherlands).
authors.forename: Albertus P H J
authors.initials: AP
authors.lastname: Schenning
keywords: X-ray scattering; alignment; fibrils; perylene bisimides; self-assembly