| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
Described here is the “precise control of molecular properties of ethynylhelicene oligomers based on the molecular design” and “the construction of aniosotropic and three-dimensional molecular-assembled systems utilizing the self-assemblies of homo- and hetero-double helices” in order to integrate the molecular-level transition between double helices and random coils to a muscle-like macroscopic motion. (1) Anisotropic and fluidic thermotropic liquid crystals were obtained by modifying the molecular structure at the termini. Structural transition in the bulk state was shown. (2) Amphiphilic oligomers with hydrophilic termini were synthesized, which showed the thermoresponse inverse to the general one of dimeric aggregates in aqueous media. Formation of vesicular assemblies were also observed. (3) Cyclic bis(ethynylhelicene) oligomers formed lyotropic liquid crystals, which changed into randomly oriented bundles by cooling. The detail of these phenomena was investigated.
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