Macroscopic ordering of helical pores for arraying guest molecules noncentrosymmetrically

Chunji Li, Joonil Cho, Kuniyo Yamada, Daisuke Hashizume, Fumito Araoka, Hideo Takezoe, Takuzo Aida and Yasuhiro Ishida ()
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Chunji Li: School of Engineering, The University of Tokyo
Joonil Cho: RIKEN Center for Emergent Matter Science, 2-1 Hirosawa
Kuniyo Yamada: RIKEN Center for Emergent Matter Science, 2-1 Hirosawa
Daisuke Hashizume: RIKEN Center for Emergent Matter Science, 2-1 Hirosawa
Fumito Araoka: RIKEN Center for Emergent Matter Science, 2-1 Hirosawa
Hideo Takezoe: Tokyo Institute of Technology
Takuzo Aida: School of Engineering, The University of Tokyo
Yasuhiro Ishida: RIKEN Center for Emergent Matter Science, 2-1 Hirosawa

Nature Communications, 2015, vol. 6, issue 1, 1-10

Abstract: Abstract Helical nanostructures have attracted continuous attention, not only as media for chiral recognition and synthesis, but also as motifs for studying intriguing physical phenomena that never occur in centrosymmetric systems. To improve the quality of signals from these phenomena, which is a key issue for their further exploration, the most straightforward is the macroscopic orientation of helices. Here as a versatile scaffold to rationally construct this hardly accessible structure, we report a polymer framework with helical pores that unidirectionally orient over a large area (∼10 cm2). The framework, prepared by crosslinking a supramolecular liquid crystal preorganized in a magnetic field, is chemically robust, functionalized with carboxyl groups and capable of incorporating various basic or cationic guest molecules. When a nonlinear optical chromophore is incorporated in the framework, the resultant complex displays a markedly efficient nonlinear optical output, owing to the coherence of signals ensured by the macroscopically oriented helical structure.

Date: 2015
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DOI: 10.1038/ncomms9418

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