Munetaka Iwamura

Graduate School of Science and Engineering for Research at University of Toyama
Lecturer
A03
Research AreasMolecular Spectroscopy, Coordination Chemistry
Participating Group (2018-2019)

Real-time observation of structural change dynamics of molecular

Keywords
Ultrafast Time Resolved Spectroscopy, Molecular Assembly, Gold Complex, Circularly Polarized Luminescence, Nuclear Wavepacket Motion, Fluorescence Up conversion Spectroscopy

Research Outline

An interesting feature of molecular crystals with domino transformation is the nature that a small stimulation on the crystals can change the molecular level structure and start phase change of the crystals. This phase change is amplified through a self-replication mechanism and develops the entire crystal to cause a drastic change of the crystal properties. This researcher will develop a variety of new molecular crystals with “Molecular domino transformation” and “Jumping crystals” and investigate the mechanism of the phase changing and establish a general molecular design concept of these molecules. The research subjects are (1) development of molecular crystals with domino transformation and the mechanism investigation (2) preparation and function of nanostructured molecular crystals through domino transformation (3) mechanistic study and functionalization of crystal jumping materials. The novel features of the domino transformation crystals, “transduction of macroscopic stimulation to molecules,”” microscopic molecular structure change affecting macroscopic nature of crystals,” can be an important clue for the study on the “direct relations between macroscopic and microscopic phenomena.”

Beat signal of transient absorption induced by nuclear wavepacket motions in oligomer of dicyano gold(I) complexes

Publications

Academic papers/reviewed

A02-32

  1. "Through-Space Charge Transfer in Copper Coordination Networks with Copper-Halide Guest Anions" *H. Ohtsu, M. Okuyama, T. Nakajima, M. Iwamura, K. Nozaki, D. Hashizume, *M. Kawano, Inorg. Chem., 60, 9273–9277 (2021).
  2. "Stepwise Observation of Iodine Diffusion in a Flexible Coordination Network Having Dual Interactive Sites" *H. Ohtsu, J. Kim, T. Kanamaru, D. Inoue, D. Hashizume, *M. Kawano, Inorg. Chem., 60,17,13727–13735 (2021).
  3. "Multi-interactive coordination network featuring a ligand with topologically isolated p-orbitals" Y. Wada, H. Ohtsu, P. M. Usov, B. Chan, K. Deekomwong, *M. Kawano, Inorg. Chem., 60, 17858-17864 (2021).
  4. "Emergence of electrical conductivity in a flexible coordination polymer by using chemical reduction" K. Fuku, M. Miyata, S. Takaishi, T. Yoshida, M. Yamashita, N. Hoshino, T. Akutagawa, H. Ohtsu, M. Kawano, *H. Iguchi, Chem. Commun., 56, 8619-8622 (2020).

A03-14

  1. "Microscopic Imaging of Chiral Amino Acids in Agar‐gel through Circularly Polarized Luminescence of Eu(III) Complex" H. Koike, K. Nozaki, M. Iwamura*, Chem. Asian J., 15, 85-90 (2020).
    DOI: 10.1002/asia.201901495
  2. "Chiral Sensing Using Circularly Polarized Luminescence of Bis (phenanthroline dicarboxylic acid) Eu(III) Complex Induced by Allosteric-type Interaction with Amino Acid Molecules" *M. Iwamura, M. Fujii, A. Yamada, H. Koike, K. Nozaki, Chem. Asian J., 14, 561-567 (2019).
    DOI: 10.1002/asia.201801777
  3. "Metal-Metal Bond Formations in [Au(CN)2-]n (n = 3, 4, 5) Oligomers in Water Identified by Coherent Nuclear Wavepacket Motions" M. Iwamura, K. Kimoto, K. Nozaki, H. Kuramochi, S. Takeuchi, T. Tahara, J. Phys. Chem. Lett., 2018, 9, 7085-7089.(Inside Cover)
    DOI: 10.1021/acs.jpclett.8b03139
Related Website(s)
Contact
miwamura[at]sci.u-toyama.ac.jp