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Computational Chemistry Research Unit
Kimihiko HIRAO
Unito Leader
Kimihiko HIRAO (D.Eng.)
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Research Areas

In this project, we develop a new reaction theory based on density functional theory (DFT) for figuring out the mechanisms of photo- and electro-chemical reactions and for designing new functional materials by quantum chemistry. Quantum chemistry has extended its applicability with the increase of computer power and plays a inreplaceable role in verifying experimental results. It is one of the main pillars of computational science using K computer. DFT is the main theory of quantum chemistry. For its high parallelization and Order-N efficiency, DFT is better suited for calculations on K computer. However, it has been difficult to apply it to the theoretical analysis of chemical reactions involving electron transfers due to its limited applicability. So far, we have developed long-range correction (LC) scheme to overcome these significant problems of DFT including the charge transfer problem. In this project, we will extend LC-DFT to more practical one by collaborating with experimental and other field theoretical investigators. Using this new theory, we will clarify the mechanisms of significant photo- and electro-chemical reactions and suggest new functional materials

Research Subject

  1. New developments of photo- and electro-chemical reaction theories
  2. Developments of high-speed computational algorithm of DFT used on K computer
  3. Reaction mechanism analyses and new functional material designs on

Related links

  1. RIKEN Advanced Institute for Computational Science Website_Laboratories PageNew Window

List of Selected Publications

  1. Y. Tawada, T. Tsuneda, S. Yanagisawa, T. Yanai and K. Hirao,:
    "A long-range- corrected time-dependent density functional theory'"
    J. Chem. Phys. 120, 8425 - 8433, 2004
  2. T. Tsuneda, J. Song, S. Suzuki, and K. Hirao,:
    "On Koopmans' theorem in density functional theory"
    J. Chem. Phys., 133, 174101(1-9), 2010

Members

Principal Investigator

Kimihiko HIRAO
Unito Leader

Staff Scientist

Jong-Won SONG
Research Scientist

Postdoctoral Fellow

Rahul KAR
Postdoctoral Researcher