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Masa-aki Morikawa Last modified date:2024.04.16

Assistant Professor / Biofunctional Chemistry
Department of Applied Chemistry
Faculty of Engineering

Graduate School
Undergraduate School

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Academic Degree
Doctor of Engineering
Country of degree conferring institution (Overseas)
Field of Specialization
molecular self-assembly, biopolymers, colloid and surface chemistry
Total Priod of education and research career in the foreign country
Outline Activities
Self-assembling molecular wires are attracted much attention in future nanochemistry, as exemplified by electron conductive media of molecular-scale electronic devices. By incorporating biomolecules as indispensable components of molecular wires, it is possible to create self-assembling molecular wires that are responsible to the specific bio-signals, such as ATP, peptides, and vitamins. We have succeeded in construction of well-developed molecular wires formed from nucleotides and cationic cyanine dyes. The complexed molecular wires were developed based on the specific recognition between nucleic acid bases and cyanine dyes. Development of a molecule recognition system based on mesoscopic scale supramolecular organization is currently under investigation.
Research Interests
  • Development of Novel Self-assembling Systems of Biomolecules by Using Combinatorial Molecular Pairing Approach
    keyword : Biomolecules, Self-assembly
  • Interfacial Material Chemistry of Ionic Liquids
    keyword : Ionic Liquids, Interfacial Chemistry
  • Development of Self-assembling System of Functional Metal Complexes
    keyword : Metal Complexes, Redox, Photoluminescence
  • Development of Solar Thermal Energy Storage System in Molecular Assemblies
    keyword : Photoisomerization, phase change, azobenzene derivatives
Academic Activities
1. Keita Ishiba, Masa-aki Morikawa, Chie Chikara, Teppei Yamada, Katsunori Iwase, Mika Kawakita, Nobuo Kimizuka, Photoliquefiable Ionic Crystals: A Phase Crossover Approach for Photon Energy Storage Materials with Functional Multiplicity, Angew. Chem. Int. Ed., 54, 1532-1536, 2014.12, 本研究は,新しいイオン性アゾベンゼン誘導体を合成し,光照射によるアゾベンゼン部位の trans-cis 異性化に伴って,結晶-イオン液体相転移を制御した初めての例である.また,UV光照射により準安定状態となった cis 型イオン液体が熱刺激によって trans 型結晶に戻る際に,異性化熱と液体-結晶相転移熱を同時に放出するため,従来に比べて2倍の熱エネルギーを貯蔵できることが明らかとなった.また,この相転移に伴って,イオン伝導度も桁違いに変化することから,新しいフェーズクロスオーバー材料として期待される..
2. Tomohiro Shiraki, Masa-aki Morikawa, and Nobuo Kimizuka, Amplification of Molecular Information through Self-Assembly:Nanofibers Formed from Amino Acids and Cyanine Dyes by Extended Molecular Pairing, Angew.Chem.Int.Ed, 47, 106, 2008.01.
1. Masa-aki Morikwa, Ionic liquids for biomaterials synthesis and solar thermal storage, 21st International Conference of Solid State Ionics (SSI-21) , 2017.06, 本発表では、バイオカプセルの作製や太陽光エネルギーの蓄熱において、イオン液体が非常に重要な役割を果たすことについて紹介した。例えば、イオン液体/水界面へのタンパク質の自発的な吸着により、有機溶媒を一切使うことなくタンパク質カプセルをワンポットで合成できる技術を開発した。また、カプセル内へ核酸や酵素を容易に内包できることを紹介した。さらに、光異性化部位を導入した新しいイオン液体を合成し、光によるイオン結晶-イオン液体間の相転移現象を利用することにより、蓄熱量を倍増できることを紹介した。.
  • Novel Self-assembling System of Biomolecules by Combinatorial Molecular Pairings
Other Educational Activities
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