2012 Fiscal Year Final Research Report
Development of anthocyanin-based photochromic material having low environmental impact and high safety
| Project/Area Number |
22550173
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Organic industrial materials
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| Research Institution | Tokyo University of Technology |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
TAKAGI Katsuhiko (財)神奈川科学技術アカデミー, 研究顧問 (60023264)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 光スイッチ / ナノ細孔体 / フォトクロミズム / アントシアニンヒドロキシメトキシカルコン / メソポーラスシリカ |
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| Research Abstract |
A composite of a synthetic anthocyanin-based dye (2-Hydroxy-4'-methoxychalcone) and mesoporous silica, which shows photochromic properties even in dry conditions (not as a solution), was prepared. For obtaining a composite material that displays a color upon ultraviolet irradiation and becomes colorless when stored in the dark, mesoporous silica that contains a small amount of Al was most suitable. On the other hand, mesoporous silica with alkyl trimethyl ammonium ions in the mesopores was most effective for a composite that showed coloration-decoloration cycles induced by alternating irradiation with ultraviolet light of different wavelengths.
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