Materials Characterization Team

Team Head

Yoshio Sakaguchi

  • Ph.D.
  • Yoshio Sakaguchi
  • Brief resume
    1981
    Ph.D., University of Tokyo
    1981
    Postdoctoral Researcher, RIKEN
    1983
    Research Scientist, Physical Organic Chemistry Laboratory, RIKEN
    1991
    Vice Chief Scientist, Physical Organic Chemistry Laboratory, RIKEN
    1993
    Visiting Associate Professor, Graduate School of Science and Engineering, Saitama University
    2000
    Visiting Professor, Graduate School of Science and Engineering, Saitama University
    2002
    Vice Chief Scientist, Surface Chemistry Laboratory, RIKEN
    2008
    Professor, Graduate School of Science and Engineering, Saitama University (-current)
    2009
    Team Head, Chemical Analysis Team, RIKEN
    2011
    Team Head, Materials Characterization Team, RIKEN (-current)

Outline

Materials Characterization Team

Our tasks include elemental analyses of organic and inorganic compounds, X-ray diffraction, electron microscopy, surveys of commercially available compounds, and support for any chemical issues. To that purpose, our technicians strive to improve their skills and provide maximized results for even unusual or extraordinary samples. Our scientists also pursue their own projects and work to expand their chemistry-related knowledge and skills to respond to any inquiry. Their projects are catalytic chemistry (the synthesis and reaction of inorganic cluster catalysts), and spin-chemistry (emission processes of organic electroluminescent materials).

Recent Research Topic

Resonant microwave effect on the extinction process of organic electroluminescent cell
Resonant microwave effect on the extinction process of organic electroluminescent cell
The insert (upper right) shows the quick decay of the emission intensity along the time/μs axis, where the driving voltage, 10 V, is removed at 0 μs. We irradiated the 100 ns microwave pulse resonant to the carriers at the time shown in the shift/μs axis. Although this effect is too small to be observed in the real signal, the difference with the decay without the microwave pulse in the bottom figure shows a clear irradiation effect depending on the irradiation time. The reversed color in the bottom figure indicates that the signal is observed as a decrease of the emission intensity.

Selected Publications

  1. S. Nagashima, S. Kamiguchi, S. Ohguchi, T. Chihara, Vapor-phase Beckmann rearrangement of cylcohexanone oxime over halide cluster catalysts, Catal. Today 2011, 164, 135.
  2. S. Nagashima, S. Kamiguchi, K. Kudo, T. Sasaki, T. Chihara, Intramolecular Condensation of 1,2-C6H4(CH2RH)2 (R = O, S, and NH) to Yield Heterocyclic Compounds over Halide-cluster Catalysts, Chem. Lett. 2011, 40, 78.
  3. S. Nagashima, S. Kamiguchi, S. Ohguchi,T. Chihara, Direct synthesis of 3-methylbenzofuran from phenol and acetone over halide cluster catalysts taking advantage of acidic and metallic properties, Chem. Eng. J. 2010, 161, 384.
  4. S. Kamiguchi, et al. Catalytic Condensation of Primary Amines, Dehydrogenation of Secondary Amines, and Dealkylation of Tertiary Amines over Solid-State Rhenium Sulfide Clusters with an Octahedral Metal Framework, J. Cluster Sci. 2009, 20, 683.
  5. H. Okimi, M. Hara, K. Asada, Y. Sakaguchi, The enhancement of the magnetic field effect on the emission intensity of the organic light-emitting diode induced by the operation time, Jpn. J. Appl. Phys. 2009, 48, 061502.
  6. N. Suzuki, et al. Reversible Haptotropic Shift in Zirconocene-Hexapentaene Complexes, J. Am. Chem. Soc. 2009, 131, 2050.
  7. N. Suzuki, D. Hashizume, H. Koshino, T. Chihara, Transformation of 1-Zirconacyclopent-3-yne, a Five-Membered Cycloalkyne, into 1-Zirconacylopent-3-ene and Formal 1-Zirconacyclopenta-2,3-dienes, Angew. Chem. Int. Ed. 2008, 47, 5198.
  8. S. Kamiguchi, S. Nagashima, T. Chihara, Catalytic Hydrogenation and Dehydrogenation over Solid-state Rhenium Sulfide Clusters with an Octahedral Metal Framework, Chem. Lett. 2007, 36, 1340.
  9. S. Kamiguchi, I. Takahashi, S. Nagashima, A. Nakamura, T. Chihara, Catalytic N-Alkylation of Amines with Primary Alcohols over Halide Clusters, J. Cluster Sci. 2007, 18, 935.
  10. S. Kamiguchi, et al. Catalytic Hydration of Alkynes over Broensted Acid Sites Developed on Halide Clusters, J. Cluster Sci. 2007, 18, 845.
  11. M. Yamada, et al. Autoregulator Protein PhaR for Biosynthesis of Polyhydroxybutyrate {P(3HB)} Has Possible Two Separate Domains That Binds to the Target DNA and P(3HB): Functional Mapping of Amino Acid Residues Responsible for DNA Binding, J. Bacteriology 2007, 189, 1118.

Core Members

Principal Investigator add delete
Yoshio Sakaguchi Team Head    
Staff Scientist add delete
Hideki Abe Senior Research Scientist    
Satoshi Kamiguchi Senior Research Scientist    
Daisuke Hashizume Senior Research Scientist    
Keiko Yamada Senior Technical Scientist    
Chieko Kariya Senior Technical Scientist    
Keiko Suzuki Senior Technical Scientist    
Shigeru Ikeda Senior Research Scientist    
Kiyoshi Nishizawa Senior Research Scientist    
Postdoctoral Fellow add delete
Yoko Aida Special Fixed Term Contract Employee    
Student Trainee add delete
Technical Assistant add delete
Miyuki Tanaka Technical Staff I    
Tomoka Kikitsu Technical Staff I    
Daishi Inoue Technical Staff I    
Administrative Assistant add delete
Visiting Research Staff add delete
Other Staff add delete
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