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Preparation and photochromism of diarylethene covalently bonded onto layered sodium-magadiite surfaces |
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| Authors: | Itsuki Shindachi Hiroshi Hanaki Ryo Sasai Tetsuya Shichi Tatsuto Yui Katsuhiko Takagi |
| Institution: | 1. Department of Crystalline Materials Science, Graduate School of Engineering Nagoya University, Furo-cho, 464-8603, Chikusa-ku, Japan 2. Research Center for Advanced Emission Management (ResCWE), Nagoya University, Chikusa-ku, 464-8603, Nagoya, Japan 3. Japan Science and Technology Agency (JST), Tokyo, Japan |
| Abstract: | Diarylethene derivatives (DE) covalently bonded to silanol oxygens of layered silicate surfaces, i.e., magadiite (Mag), were synthesized and investigated for their photochromic behavior. The DE-Mag layered hybrids were found to undergo reversible color change by alternating UV and visible light irradiation. A more highly efficient, reproducible photochromic behavior was realized with DE-Mag than with a corresponding DE-Si possessing silyl substituents on DE in place of the Mag surface. Moreover, the present covalently bonded DE exhibited an improvement over DE hybrids incorporated in layered double hydroxide (LDH) clays, in which the repetitive photochromic behavior decreased during alternating irradiation, due to the accumulation of the photochemically inert parallel isomers of DE. |
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