title: Macroscopic ordering of helical pores for arraying guest molecules noncentrosymmetrically.
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 cm(2)). 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.
authors.affiliation: Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Hongo, Bunkyo, Tokyo 113-8656, Japan.
authors.forename: Chunji
authors.initials: C
authors.lastname: Li
authors.affiliation: RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
authors.forename: Joonil
authors.initials: J
authors.lastname: Cho
authors.affiliation: RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
authors.forename: Kuniyo
authors.initials: K
authors.lastname: Yamada
authors.affiliation: RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Hashizume
authors.affiliation: RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.|Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S8-42 O-okayama, Meguro, Tokyo 152-8552, Japan.
authors.forename: Fumito
authors.initials: F
authors.lastname: Araoka
authors.affiliation: Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S8-42 O-okayama, Meguro, Tokyo 152-8552, Japan.
authors.forename: Hideo
authors.initials: H
authors.lastname: Takezoe
authors.affiliation: Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Hongo, Bunkyo, Tokyo 113-8656, Japan.|RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
authors.forename: Takuzo
authors.initials: T
authors.lastname: Aida
authors.affiliation: RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.|PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Ishida