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Chemistry Dept.

Dept. of Chemistry
OKAYAMA UNIVERSITY
Okayama-shi, Kita-ku
Tsushimanaka 3-1-1
JAPAN 700-8530
FAX: 086-251-7853

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Jian Tang

Jian Tang

Associate Professor

Research field : Spectrochemistry

email

Department of Chemistry, Okayama University, Okayama 700-8530, Japan
FAX +81-86-251-7853

Education

B.Sc. (Sichuan Univ., China), M.Sc. (Sichuan Univ., China; Toyama Univ., Japan), D.Sc. (Sokendai (Graduate Univ. for Advanced Studies), Japan)

Academic Career

  • Postdoc at Department of Chemistry, the University of Chicago (1996-1998)
  • JSPS Postdoctoral Fellow at Tokyo University (1999-2000)
  • Visiting Scientist at Steacie Institute for Molecular Sciences, NRC of Canada (2001-2003)
  • Visiting Scientist at University of Waterloo, Canada (Jan. - Apr., 2004))
  • Associate Professor at Department of Chemistry, Okayama University (2004.5-)

Group Web Site

Research Interests

  • Vibrational-rotational spectroscopy of unstable molecular species (free radicals, molecular ions, and molecular complexes)
  • Infrared spectroscopy of He and H2 molecular clusters - Relevant to superfluidity
  • Infrared spectroscopy of molecular complexes - Relevant to astronomical and atmospheric chemistry

One of my present research interests is to study molecular clusters with 1 up to 20 helium atoms or hydrogen molecules.

For example, gas-phase HeN-CO2 clusters (N up to 20) are generated in a supersonic expansion of molecular beam with trace amount of CO2 seeded in helium buffer gas of high pressure (up to 35atm) and low temperature (down to 170K). Vibrational-rotational spectra of HeN-CO2 clusters are observed with infrared diode laser spectrometer. The vibrational and rotational analyses showed the structural characters with the size change and the evolution from molecular clusters to quantum superfluid liquid. We hope that study of infrared spectroscopy of hydrogen clusters can, in the same way, reveal the evolution of hydrogen clusters into quantum liquid, and can result finally in the finding of superfluidity of para-hydrogen in bulk liquid.

Selected Publications

  • 1. Bridging the Gap between Small Clusters and Nanodroplets: Spectroscopic Study and Computer Simulation of Carbon Dioxide Solvated with Helium Atoms
    J. Tang, A. R. W. McKellar, F. Mezzacapo, and S. Moroni, Phys. Rev. Lett. 92, 145503_1-145503_4 (2004).
  • 2. Spectroscopic Studies of Quantum Solvation in 4HeN-N2O Clusters
    Y. Xu, W. Jäger, J. Tang, and A.R.W. McKellar, Phys. Rev. Lett. 91, 163401_1-163401_4 (2003).
  • 3. Quantum Solvation of Carbonyl Sulfide with Helium Atoms
    J. Tang, Y. Xu, A. R. W. McKellar, and W. Jäger, Science 297, 2030-2033 (2002).
  • 4. Laboratory Observation of Para-H2C4N
    J. Tang, Y. Sumiyoshi, and Y. Endo, Astrophys. J. 552, 409-412 (2001).
  • 5. CH5+: The Infrared Spectrum Observed
    E. T. White, J. Tang, and T. Oka, Science 284, 135-137 (1999).

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