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Mesoscale Polarization by Geometric Frustration in Columnar Supramolecular Crystals
Author(s) -
Zehe Christoph S.,
Hill Joshua A.,
Funnell Nicholas P.,
Kreger Klaus,
van der Zwan Kasper P.,
Goodwin Andrew L.,
Schmidt HansWerner,
Senker Jürgen
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201612122
Subject(s) - frustration , materials science , geometrical frustration , polarization (electrochemistry) , steric effects , dipole , supramolecular chemistry , mesoscale meteorology , condensed matter physics , crystallography , liquid crystal , chemical physics , crystal structure , chemistry , physics , stereochemistry , optoelectronics , organic chemistry , meteorology
Columnar supramolecular phases with polarization along the columnar axis have potential for the development of ultrahigh‐density memories as every single column might function as a memory element. By investigating structure and disorder for four columnar benzene‐1,3,5‐trisamides by total X‐ray scattering and DFT calculations, we demonstrate that the column orientation, and thus the columnar dipole moment, is receptive to geometric frustration if the columns aggregate in a hexagonal rod packing. The frustration suppresses conventional antiferroelectric order and heightens the sensitivity towards collective intercolumnar packing effects. The latter finding allows for the building up of mesoscale domains with spontaneous polarization. Our results suggest how the complex interplay between steric and electrostatic interactions is influenced by a straightforward chemical design of the molecular synthons to create spontaneous polarization and to adjust mesoscale domain size.