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Hayashi S. Curving deformation-induced photoluminescence changes and anisotropy analysis in elastic organic crystals. CrystEngComm 2021. [DOI: 10.1039/d1ce00400j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mechanical deformation-induced physical property changes of elastically flexible molecular crystals were successfully investigated by spatially resolved μ-photoluminescence (PL) spectroscopy for the PL analysis at both the outer and inner sides.
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Affiliation(s)
- Shotaro Hayashi
- School of Environmental Science and Engineering, Kochi University of Technology, Kami, Kochi, 782-8502, Japan
- Research Center for Molecular Design, Kochi University of Technology, Kami, Kochi, 782-8502, Japan
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Seki T, Hoshino N, Suzuki Y, Hayashi S. Functional flexible molecular crystals: intrinsic and mechanoresponsive properties. CrystEngComm 2021. [DOI: 10.1039/d1ce00388g] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Flexible molecular crystals have attracted much attention to unique optoelectronic applications and stimuli-responsive chemistry, resulting in various functional molecular crystals for controlling photons, phonons, electrons, and magnons.
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Affiliation(s)
- Tomohiro Seki
- Department of Chemistry, Faculty of Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Norihisa Hoshino
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Yasutaka Suzuki
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, Yamaguchi, 753-8512, Japan
| | - Shotaro Hayashi
- School of Environmental Science and Engineering, Kochi University of Technology, 185 Tosayamada Miyanokuchi, Kami, Kochi, 782-8502, Japan
- Research Center for Molecular Design, Kochi University of Technology, Japan
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Elastic Organic Crystals of π-Conjugated Molecules: New Concept for Materials Chemistry. Symmetry (Basel) 2020. [DOI: 10.3390/sym12122022] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
It is generally believed that organic single crystals composed of a densely packed arrangement of anisotropic, organic small molecules are less useful as functional materials due to their mechanically inflexible and brittle nature, compared to polymers bearing flexible chains and thereby exhibiting viscoelasticity. Nevertheless, organic crystals have attracted much attention because of their tunable optoelectronic properties and a variety of elegant crystal habits and unique ordered or disordered molecular packings arising from the anisotropic molecular structures. However, the recent emergence of flexible organic crystal materials showing plasticity and elasticity has considerably changed the concept of organic single crystals. In this review, the author summarizes the state-of-the-art development of flexible organic crystal materials, especially functional elastic organic crystals which are expected to provide a foothold for the next generation of organic crystal materials.
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