A03 Masaaki Ohba

Masaaki Ohba

A04 Planning


Graduate School of Science, Kyushu University





Research Project

Rational Design and Synergetic Symmetry of Asymmetric Porous Structures


Tomomi Koshiyama (Assistant Professor, Graduate School of Science, Kyushu University)
Akihiro Hori (Researcher, WPI-iCeMS, Kyoto University )
Ryo Ohtani (Assistant Professor, Graduate School of Science and Technology, Kumamoto University)


We aim for controlling functions and physical properties through directional transfer and conversion of molecular information (energy, spin, phase, structure etc.) based on asymmetric space providing high anisotropy and directionality. We develop rational construction methods for asymmetric or chiral arrangement of functional molecular units along the following four subjects. (1) Construction of asymmetric porous coordination frameworks consisting of asymmetric metal complexes, bridging ligands and co-ligands. (2) Sequential synthesis of asymmetric porous frameworks having alternate arrangement of different components. In such asymmetric frameworks bring anisotropic host-guest interaction to restrict guest orientation. We investigate new control mechanism of functions and physical properties by inducing anisotropic arrangement changes of confined guest molecules. (3) Formation of hierarchical and anisotropic arrangement of functional metal complexes by Integration of cyclic metal cluster and polyoxometallate, and (4) by incorporation of lipophilic functional metal complexes into a lipid bilayer.

Research Areas

Coordination Chemistry, Inorganic Chemistry, Solid State Chemistry


Porous Coordination Polymer, Metal-Organic Framework, Lipid Bilayer, Spin State Switching, Energy Transfer


[11] Development of a Minimal Photosystem for Hydrogen Production in Inorganic Chemical Cell,
Keita Nakanishi; Geoffrey J. T. Cooper; Laurie J. Points; Leanne G. Bloor; Masaaki Ohba; Leroy Cronin, Angew. Chem. Int. Ed., 57, , 2018
DOI: 10.1002/anie.201805584.
[10] A Comprehensive Study on the Electronic State of Hydrogen in α‐Phase PdH(D)x—Does a Chemical Bond Between Pd and H(D) Exist?,
Shun Dekura; Hirokazu Kobayashi; Ryuichi Ikeda; Mitsuhiko Maesato; Haruka Yoshino; Masaaki Ohba; Takayoshi Ishimoto; Shogo Kawaguchi; Yoshiki Kubota; Satoru Yoshioka; Syo Matsumura; Takeharu Sugiyama; Hiroshi Kitagawa, Angew. Chem. Int. Ed., 57, 9823 - 9827, 2018
DOI: 10.1002/anie.201805753.
[9] Selective Synthesis and Structural Conversion of Di- and Octa-nuclear Mn(II), Co(II), and Zn(II) Complexes,
Tatsuo Togo; Yasuhiro Tsuji; Akio Mishima; Tomomi Koshiyama; Masaaki Ohba, Chem. Lett., 47, 5, 647 - 649, 2018
DOI: 10.1246/cl.180085.
[8] Nonanuclear Ni(II) Complexes in a [1-7-1] Formation Derived from Asymmetric Multidentate Ligands: Magnetic and Electrochemical Properties,
Yasuhiro Tsuji; Tatsuo Togo; Akio Mishima; Tomomi Koshiyama; Masaaki Ohba, Dalton Trans., 47, 4036 - 4039, 2018
DOI: 10.1039/C8DT00161H.
[7] Regulation in Long-range Magnetic Ordering in 2-D Honeycomb Network of (NBu4)[MIIFeIII(ox)3] (MII = Mn, Fe, Co, Ni and Cu) Family,
Hisashi Okawa; Akio Mishima; Haruka Yoshino; Masaaki Ohba, Chem. Lett., 47, 444 - 447, 2018
DOI: 10.1246/cl.171162.
[6] Direct Synthesis of Prussian Blue Nanoparticles in Liposomes Incorporating Natural Ion Channels for Cs+ Adsorption and Particle Size Control,
Tomomi Koshiyama; Motoki Tanaka; Masayuki Honjo; Yumi Fukunaga; Tomoya Okamura; Masaaki Ohba, Langmuir, 34, 4, 1666 - 1672, 2018
DOI: 10.1021/acs.langmuir.7b03926.


[5] Tuning the Gate-Opening Pressure and Particle Size Distribution of the Switchable Metal-Organic Framework DUT-8(Ni) by Controlled Nucleation in a Micromixer,
Hiroki Miura; Volodymyr Bon; Irena Senkovska; Sebastian Ehrling; Satoshi Watanabe; Masaaki Ohba; Stefan Kaskel, Dalton Trans., 46, 14002 - 14011, 2017
DOI: 10.1039/C7DT02809A.
[4] Sensing of Fluoride Ions in Aqueous Media Using a Luminescent Coordination Polymer and Liposome Composite,
Masayuki Honjo; Tomomi Koshiyama; Yumi Fukunaga; Yasuhiro Tsuji; Motoki Tanaka; Masaaki Ohba, Dalton Trans., 46, 7141 - 7144, 2017
DOI: 10.1039/C7DT01071K.
[3] Enhancement of Guest-Responsivity by Mesocrystallization of Porous Coordination Polymers,
Akio Mishima; Tomomi Koshiyama; Jose A. Real; Masaaki Ohba, J. Mater. Chem. C, 5, 3706 - 3713, 2017
DOI: 10.1039/C7TC00751E.
[2] An Effective Synthetic Process for Pt-ZnO Composite and PtZn Alloy Using Spherical Coordination Polymer Particles as Precursors,
Hitoshi Kumagai; Yoshiyuki Sakamoto; Hiroyuki Takeda; Shinichi Matsunaga; Masaaki Ohba; Shinji Inagaki, Chem. Lett., 46, 8, 1121 - 1124, 2017
DOI: 10.1246/cl.170388.
[1] Domain Size Dependent Fluorescence Resonance Energy Transfer in Lipid Domain Incorporated Fluorophores,
Tasuru Hatae; Tomomi Koshiyama; Masaaki Ohba, Chem. Lett., 46, 756 - 759, 2017
DOI: 10.1246/cl.170104.