| Project/Area Number |
17550133
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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 |
Functional materials chemistry
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| Research Institution | Kumamoto University |
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Principal Investigator |
TAKAFUJI Makoto Kumamoto University, Graduate School of Science and Technology, Associate Professor, 大学院自然科学研究科, 助教授 (50332086)
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| Co-Investigator(Kenkyū-buntansha) |
IHARA Hirotaka Kumamoto University, Graduate School of Science and Technology, Professor, 大学院自然科学研究科, 教授 (10151648)
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| Project Period (FY) |
2005 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2006: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2005: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | SELF-ASSEMBLY / INDUCED CIRCULAR DICHROISM / CHIRALITY / ORGANOGELS / HIGHLY-ORDERED STRUCTURE / HOST-GUEST CHEMISTRY |
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| Research Abstract |
Organogel systems with self-assembling low molecular compounds have been attractive as a construction tool for bottom-up nanotechnology because they are essentially generated through three-dimensional network formation from nano-sized one-dimensional fibrillar aggregates, constructed of highly-ordered assemblies like aqueous lipid bilayer membranes. It is also known that a number of chiral compounds form nano-sized one-dimensional unique aggregates with large curvatures such as nanotubes, nanohelices, and nanoribbons. Furthermore, Generation and enhancement of supramolecular functions are often observed in self-assembling systems. Induction of chirality is one of the typical features of self-assembling systems. In this study, we have established a facile method to embed a supramolecular complex composed of chirally-ordered lipid aggregates and achiral dyes into a solid polymer film. Chirally-oriented lipid aggregates were doped into a solid polymer film, which was readily prepared by casting and removing a solvent from anionic L-glutamide-derived organogels and polystyrene. When a cationic achiral dye was mixed into this system, the resultant polymer film showed induced circular dichroism (CD) due to chiral complex formation with the achiral dye on the highly-ordered structures based on the L-glutamide-derived lipid. An optical activity of the polymer film is readily tunable using ICD around the absorption bands of the dyes. This method would be useful for the design of new soft materials with interesting optical properties.
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