Research Interests of Kenji Honma

    1. Dynamics of Gas-Phase Elementray Reactions

      Chemical reactions are governed by their reactive potential energy surfaces and initial conditions of reactive encounters.
      Photodissociation and bimolecular reactions are studied experimentally to obtain detail information about the potential energy surfaces
      and dynamics on them.

      Recent Publications

      1. Reaction dynamics of Al + O2 ĒŠ AlO + O studied by a crossed-beam velocity map imaging technique: Vib-rotational state selected angular-kinetic energy distribution.
        Kenji Honma, Kazuki Miyashita, and Yoshiteru Matsumoto
        J. Chem. Phys. 140, 214304 (8 pages) (2014).
      2. Dynamics of oxygen Rydberg atom generation following O 1s inner-shell excitation of H2O.
        Tatsuo Gejo, Takeshi Ikegami, Kenji Honma, Osamu Takahashi, Eiji Shigemasa, Y. Hikosaka, and Yusuke Tamenori
        J. Chem. Phys. 140, 214310(7 pages) (2014).
      3. Laser initiated reactions in N2O clusters studied by time-sliced ion velocity imaging technique.
        Kenji Honma
        J. Chem. Phys. 139, 044307(9 pages) (2013).
      4. Fluorescence Decay Processes Following Resonant 2p Photoexcitation of Ar Atoms and Clusters Using a Time-Resolved Fluorescence and Photoion Coincidence Technique.
        Tatsuo Gejo, Tsuyoshi Ikegami, Kenji Honma, James Harries, and Yusuke Tamenori
        J. Phys. B: At. Mol. Opt. Phys. 46,075102 (9 pages) (2013).
      5. Angle-resolved metastable fragment yields spectra of N2 and CO in K-edge excitation energy region.
        T. Gejo, T. Tamura, K. Honma, E. Shigemasa, Y. Hikosaka, and Y. Tamenori
        J. Chem. Phys. 136, 054201 (7 pages) (2012).
      6. Long-lived, highly-excited neutral H production following O 1s photo-excitation of gas-phase water molecules.
        James R. Harries, T. Gejo, K. Honma, M. Kuniwake, J. P. Sullivan, M. Lebech, and Y. Azuma
        J. Phys. B: At. Mol. Phys. 44, 095101 (7 pages) (2011).
      7. Dissociation and recapture dynamics in H2O following O 1s inner-shell excitation.
        T. Gejo, M. Oura, M. Kuniwake, K. Honma, and J. R. Haries
        J. Phys.: Conference Series 288, 012023 (7 pages) (2011).
      8. Dynamics of reaction Si + O2 ĒŠ SiO + O studied by the crossed-beam LIF technique.
        R. Yamashiro, Y. Matsumoto, and Kenji Honma
        J. Chem. Phys. 128, 084308(6 pages) (2008).

    2. Reaction Kinetics and Dynamics of Gas-Phase Transition Metal Atoms

      Transition metal atoms are characterized by almost degenerated ns and (n-1)d orbitals which result in unique electronic structure
      and reactivities. We have studied the interaction of gas-phase transition metal atoms with simple molecules to clarify relationship
      between the electronic properties (configuration, spin multiplicity and so on) and reactivities. These studies are also expected
      to open basic understanding of home- and heterogeneous catalytic reactions.
      Reaction rate constants of specific electronic states have been determined by the technique combining discharge-flow and laser-induced
      fluorescence. Crossed-beam experiments are employed to obtain more detail information about interaction potentials and reaction mechanisms.

      Recent Publications

      1. Reaction dynamics of Mo + O2 ĒŠ MoO + O studied by a crossed-beam velocity map imaging technique.
        Kenji Honma and Yoshiteru Matsumoto
        J. Chem. Phys. 136, 034301 (7 pages) (2012).
      2. Time-sliced velocity imaging study of reaction Y + O2 ĒŠ YO + O.
        Kenji Honma and Yoshiteru Matsumoto
        Phys. Chem. Chem. Phys. 13, 8236-8244 (2011).
      3. Excited state reaction dynamics of Ti(a5FJ) + O2 ĒŠ TiO(A,B) + O studied by a crossed-beam technique.
        Ryo Yamashiro, Yoshiteru Matsumoto, and Kenji Honma
        J. Chem. Phys. 131, 044316(6 pages) (2009).

    3. Dynamics in Gas-Phase Clusters and Dropplets

      Gas-phase clusters of solute-solvent systems are recognized as microscopic "solution", and studying reactions in them provide
      unique opportunity to study "solvent effects" from molecular level. Reactions can be studied in the "solution" with specific number
      of "solvents", and in favorable cases, it is possible to specify the geometry of solute-solvent interaction.
      The supersonic jet from a high temperature nozzle is used to generate the gas phase clusters and electronic transitions of the clusters
      with specific number of "solvents" are studied by TOF-REMPI and LIF. Very sensitive direct absorption technique, IRCRD(Infrared Cavity Ringdown)
      spectroscopy was also used to measure IR spectra of clusters. Another new technique, electrospray-LIF, has recently introduced
      to study the gas phase clusters of involatile or thermally unstable species, such as amino acids and proteins.

      Recent Publications

      1. Cyclic structure of (pyrrole)2-(acetone)1 binary trimer: Comparative study of the N-HcO=C hydrogen bond.
        Yoshiteru Matsumoto, Jun-ichi Iwamoto, and Kenji Honma
        Chem. Phys. Lett. 578, 43-48 (2013).
      2. Solvated structures of pyrrole-acetonitrile binary clusters studied by infrared cavity ringdown spectroscopy.
        Jun-ichi Iwamoto, Yoshiteru Matsumoto, and Kenji Honma
        Chem. Phys. 419, 184-192 (2013).
      3. Photodissociation investigation of doubly charged ethanol clusters induced by inner-shell electron ionization.
        Yusuke Tamenori, Kazumasa Okada, Kiyohiko Tabayashi, A. Hiraya, T. Gejo, and Kenji Honma
        J. Chem. Phys. 134, 204301(9 pages) (2011).
      4. Site- and geometry-specific CH---O interaction in small acetaldehyde clusters studied with core-electron excitation spectroscopy in the carbon K-edge region.
        K. Tabayashi, Y. Tsutsumi, M. Chohda, O. Takahashi, Y. Tamenori, I. Higuchi, I. H. Suzuki, S. Nagaoka, T. Gejo, and K. Honma
        J. Phys.: Conference Series 288, 012022 (11 pages) (2011).
      5. Hydrogen bonded structures for self-aggregates of 2,5-dimethylpyrrole and its binary clusters with pyrrole studied by IR cavity ringdown spectroscopy.
        Yoshiteru Matsumoto and Kenji Honma
        Phys. Chem. Chem. Phys. 13, 13962-13971 (2011).
      6. Core-electron excitation and fragmentation processes of hydrogen bonded acetic-acid clusters in the oxygen K-edge region.
        K. Tabayashi, K. Yamamoto, T. Maruyama, H. Yoshida, K. Okada, Y. Tamenori, I. H. Suzuki, T. Gejo, and K. Honma
        J. Electron Spectro. Related Phenom. 184, 134-139 (2011).
      7. Crystalline structures in large ammonia clusters studied by IR cavity ringdown spectroscopy and density functional theory calculation.
        Yoshiteru Matsumoto and Kenji Honma
        Chem. Phys. Lett. 490, 9-13 (2010).
      8. Hydrogen-bonded structures of the pyrrole-solvent clusters: Infrared cavity ringdown spectroscopy and quantum chemical calculations.
        Yoshiteru Matsumoto and Kenji Honma
        J. Chem. Phys. 130, 054311(11 pages) (2009).
      9. Hydrogen bonding in acetone clusters probed by near-edge x-ray absorption fine structure spectroscopy in the carbon and oxygen K-edge regions.
        Y. Tamenori, O. Takahashi, K. Yamashita, Y. Yamaguchi, K. Okada, K. Tabayashi, T. Gejo and K. Honma
        J. Chem. Phys. 131, 174311(9 pages) (2009).

      Go back to Top of Prof. Honma