Development of fast photochromism system based on strained molecular structures
| Project/Area Number |
15H03858
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Organic and hybrid materials
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| Research Institution | Nara Institute of Science and Technology |
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Principal Investigator |
Nakashima Takuya 奈良先端科学技術大学院大学, 先端科学技術研究科, 准教授 (70379543)
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| Project Period (FY) |
2015-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2016: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2015: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
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| Keywords | 光化学 / フォトクロミック反応 / 環状化合物 / 立体配座制御 / 分子機械 / 光物性 / 合成化学 / 有機工業化学 / 大環状分子 / 置換基効果 |
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| Outline of Final Research Achievements |
Fast photochromism systems have been attracting interest for a wide range of applications. The acceleration of spontaneous fading reaction in the photochromic diarylethene system based on 6-pai electrocyclization reaction was attempted. Modulations in the chemical structure especially on the geometry of polycyclic closed- and colored-ring form have successfully led to the acceleration of color fading reaction. Several bulky substituents were introduced at the both sides of photochromic reactive 6-pai system, leading to a substantial acceleration of color fading reaction. A macrocyclic compound was also prepared based on a photochromic tetrathiazole, giving a strained colored form having a bicyclic structure with less thermal stability. The tetrathiazole platform was applied to chiroptical photoswitches.
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| Academic Significance and Societal Importance of the Research Achievements |
従来、無色体と着色体が双安定として知られるジアリールエテン系化合物において、着色体の熱安定性を下げて、自発消色反応を加速することを試みたことに学術的な意義がある。一方、現在、広く利用されているスピロピラン系の化合物よりも光着色性、化学的安定性に優れたジアリールエテン系化合物において高速自発消色を実現したことにより、サングラス等の調光活性化合物の選択肢を広げたことは、社会的に意義のある成果である。
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Report
(5 results)
Research Products
(44 results)
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[Journal Article] Dual Photochemical Bond Cleavage for a Diarylethene-Based Phototrigger2016
Author(s)
Galangau, Olivier,Delbaere, Stephanie,Ratel-Ramond, Nicolas, Rapenne, Gwenael, Li, Ruiji,Calupitan, Jan Patrick Dela Cruz,Nakashima, Takuya, Kawai, Tsuyoshi
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Journal Title
JOURNAL OF ORGANIC CHEMISTRY
Volume: 81
Issue: 22
Pages: 11282-11290
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Self-Contained Photoacid Generator Triggered by Photocyclization of Triangle Terarylene Backbone2015
Author(s)
T. Nakashima, K. Tsuchie, R. Kanazawa, R. Li, S. Iijima, O. Galangau, H. Nakagawa, K. Mutoh, Y. Kobayashi, J. Abe, T. Kawai
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Journal Title
J. Am. Chem. Soc.
Volume: 137
Issue: 22
Pages: 7023-7026
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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