title: Light-melt adhesive based on dynamic carbon frameworks in a columnar liquid-crystal phase.
abstract: Liquid crystal (LC) provides a suitable platform to exploit structural motions of molecules in a condensed phase. Amplification of the structural changes enables a variety of technologies not only in LC displays but also in other applications. Until very recently, however, a practical use of LCs for removable adhesives has not been explored, although a spontaneous disorganization of LC materials can be easily triggered by light-induced isomerization of photoactive components. The difficulty of such application derives from the requirements for simultaneous implementation of sufficient bonding strength and its rapid disappearance by photoirradiation. Here we report a dynamic molecular LC material that meets these requirements. Columnar-stacked V-shaped carbon frameworks display sufficient bonding strength even during heating conditions, while its bonding ability is immediately lost by a light-induced self-melting function. The light-melt adhesive is reusable and its fluorescence colour reversibly changes during the cycle, visualizing the bonding/nonbonding phases of the adhesive.
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.|PRESTO, Japan Science and Technology Agency, Kyoto 606-8502, Japan.
authors.forename: Shohei
authors.initials: S
authors.lastname: Saito
authors.affiliation: Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan.
authors.forename: Shunpei
authors.initials: S
authors.lastname: Nobusue
authors.affiliation: Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan.
authors.forename: Eri
authors.initials: E
authors.lastname: Tsuzaka
authors.affiliation: Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan.
authors.forename: Chunxue
authors.initials: C
authors.lastname: Yuan
authors.affiliation: Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan.
authors.forename: Chigusa
authors.initials: C
authors.lastname: Mori
authors.affiliation: Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan.
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Hara
authors.affiliation: Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Seki
authors.affiliation: Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan.|School of Chemistry, University of Costa Rica, San Pedro Montes de Oca, San José 11501-2060, Costa Rica.
authors.forename: Cristopher
authors.initials: C
authors.lastname: Camacho
authors.affiliation: Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan.|Institute of Transformative Bio-Molecules, Nagoya University, Nagoya 464-8602, Japan.
authors.forename: Stephan
authors.identifier: 0000-0003-4995-4991
authors.initials: S
authors.lastname: Irle
authors.affiliation: Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan.|Institute of Transformative Bio-Molecules, Nagoya University, Nagoya 464-8602, Japan.
authors.forename: Shigehiro
authors.initials: S
authors.lastname: Yamaguchi