| Project/Area Number |
18K05265
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 35030:Organic functional materials-related
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| Research Institution | Ritsumeikan University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
久野 恭平 立命館大学, 生命科学部, 助教 (30822845)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 発光 / 液晶 / 凝集誘起発光 / 金錯体 / 結晶 / 高分子 |
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| Outline of Final Research Achievements |
Highly luminescent materials are of great interest for use in light-emitting devices. However, the luminescence intensity of most organic molecules is abruptly reduced in condensed phases owing to aggregation-caused quenching. Recently, some types of organic molecules have shown strong photoluminescence in the condensed phase, where aggregation enhanced the photoluminescence through a phenomenon called aggregation-induced emission (AIE). The structure of their molecular aggregates, as well as their own molecular structure, must strongly affect the luminescence of AIE materials. We have developed liquid-crystalline (LC) luminophores with the AIE property (AIEgen). We observed that acrylate polymers having an LC AIEgen in their side chain changed the luminescent color from blue to white by the glassy-to-LC phase transition. In addition, we discovered that the size of the materials is crucial to control their materials’ properties.
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| Academic Significance and Societal Importance of the Research Achievements |
機能分子を材料へと展開する場合，しばしば微粒子や薄膜として利用される。本研究の結果は，微粒子や薄膜などはバルク結晶から期待されるものとは全く異なる物性を示す可能性を示唆しており，機能材料の設計においてはサイズと物性の相関が非常に重要な知見となる。すなわち，特に有機機能材料の設計において従来重視されてきた「分子構造と機能の相関」だけでなく，同じ分子構造でも材料サイズによって機能・性能が変化するという「材料サイズと機能の相関」も考慮した設計が必要となる。
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