Photoinduced topographical changes on microcrystalline surfaces of diarylethenes
| Autor: | Shinichiro Nakamura, Noriko Fujinaga, Kengo Hyodo, Naoki Nishikawa, Kazuki Yamamoto, Yuko Kojima, Masakazu Morimoto, Kingo Uchida, Satoshi Yokojima, Ryo Nishimura, Tsuyoshi Tsujioka, Seiji Yamazoe |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Mathematics::Commutative Algebra Crystal growth 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photochemistry 01 natural sciences 0104 chemical sciences Crystal chemistry.chemical_compound Microcrystalline Diarylethene chemistry Physics::Atomic and Molecular Clusters General Materials Science Physics::Chemical Physics Crystal habit 0210 nano-technology Glass transition Isopropyl Visible spectrum |
| Zdroj: | CrystEngComm. 18:7229-7235 |
| ISSN: | 1466-8033 |
| DOI: | 10.1039/c6ce00718j |
| Popis: | By alternate irradiation with UV and visible light, reversible topographical changes were observed on the microcrystalline surfaces of diarylethene derivatives above the glass transition temperatures (Tg) of their open-ring isomers. For the photogenerated closed-ring isomers, the crystal growth proceeded at the surface softened by molecular movement. This is the self-aggregation of the closed-ring isomers. The photogenerated surface topographies appear depending on the crystal habits of the closed-ring isomers. Reflecting the properties (crystal habits) of diarylethene derivatives, we obtained cubic, needle, and plate-shaped crystals of the closed-ring isomers on the microcrystalline surfaces of the open-ring isomers by irradiation with UV light. Even a derivative having one isopropyl group at a reactive carbon atom, whose closed-ring isomer is thermally unstable, showed photoinduced topographical changes, because the Tg of the open-ring isomer is around ambient temperature. |
| Databáze: | OpenAIRE |
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