Division of Materials Science, NAIST

Photonic Molecular Science Laboratory

Staff & Contact
Educational StaffProf. Tsuyoshi Kawai
Associate Prof. Takuya Nakashima
Assistant Prof. Yoshiyuki Nonoguchi, Mihoko Yamada
ContactFAX: +81-743-72-6179
URLhttps://mswebs.naist.jp/LABs/kawai/english/index.html

Research activity of this laboratory is focused on “Photonic Molecular Science”, a new research field covering molecules, polymers, coordination compounds and low-dimensional nanomaterials with advanced photo-functionality. We synthesize these new materials for future energy resource, sensors, displays and precision chemical fabrication processes. We accept students who have been educated in chemistry and chemistry-related field in Japanese and overseas universities. Small number of students may join from solid state physics, material science and electronic engineering. Students are motivated to have advanced skills and knowledge on organic and inorganic chemical syntheses and material characterization, which are essential for future advanced researchers in chemistry, material chemistry and device science with photo-functionality. Our current research interest is dedicated to following topics;

 

1.Photoresponsive molecules based on terarylene structures for photon quantitative reactions, photoacid generators (PAGs), ultra-efficient oxidative cycloreversion, and photoswitching of circularly polarized luminescence (CPL)
2.Nanoparticles chemistry through surface molecular design for self-assembly, chiral chemistry, and composite materials
3.Supramolecular functionalization of carbon nanotubes for thermoelectric energy conversion
4.Coordination compounds based on structurally curved ligands and their supramolecular control of emission properties.

Fig.1 Schematic illustration for photoisomerization reactions of our unique photochromic molecule, which exhibits photoreaction with quantum yield of unity, a “photon-quantitative reaction”

  • Fig. 2 TEM images of Self-assembling structures of amphiphilic semiconduc¬tor nanoparticles with rod-(left) and tetrapod-(right) shape.
  • Fig. 3 A representative concept for su¬pramolecular n-type doping of carbon nanotubes.

1.Y. Hashimoto, T. Nakashima, M. Yamada, J. Yuasa, G. Rapenne, T. Kawai, “Hierarchical Emergence and Dynamic Control of Chirality in a Photoresponsive Dinuclear Complex”, J. Phys. Chem. Lett. 9, 2151-2157 (2018)
2.J. Kuno, Y. Imamura, M. Katouda, M. Tashiro, T. Kawai, T. Nakashima, “Inversion of Optical Activity in the Synthesis of Mercury Sulfide Nanoparticles: Role of Ligand Coordination”, Angew. Chem. Int. Ed., 57, 12022-12026 (2018)
3.T. Y. Bin, T. Kawai, J. Yuasa, “Ligand-to-Ligand Interactions Direct Formation of D2-Symmetrical Alternating Circular Helicate”, J. Am. Chem. Soc., 140, 3683-3689 (2018)
4.R. Sethy, J. Kumar, R. Métivier, M. Louis, K. Nakatani, N. M. T. Mecheri, A. Subhakumari. K. G. Thomas, T. Nakashima, “Enantioselective Light Harvesting with Perylenediimide Guests on Self-Assembled Chiral Naphthalenediimide Nanofibers”, Angew. Chem. Int. Ed., 56, 15053-15057 (2017).
5.Y. Taniguchi, M. A. B. Sazali, Y. Kobayashi, N. Arai, T. Kawai, T. Nakashima, “Programmed Self-Assembly of Branched Nanocrystals with an Amphiphilic Surface Pattern”, ACS Nano, 11, 9312-9320 (2017).
6.Y. Nonoguchi, S. Sudo, A. Tani, T. Murayama, Y. Nishiyama, R. M. Uda, T. Kawai, “Solvent Basicity Promotes the Hydride-mediated Electron Transfer Doping of Carbon Nanotubes”, Chem. Commun., 53, 10259-10262 (2017)
7.Y. Nonoguchi, M. Nakano, T. Murayama, H. Hagino, S. Hama, K. Miyazaki, R. Matsubara, M. Nakamura, T. Kawai, “Simple Salt-coordinated n-Type Nanocarbon Materials Stable in Air”, Adv. Funct. Mater., 26, 3021-3028 (2016).

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