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Researcher information
Masaaki OHBA Last modified date：2013.5.16

Professor / Inorganic and Analytical Chemistry
Department of Chemistry
Faculty of Sciences


Graduate School
Department of Chemistry
Graduate School of Sciences
Undergraduate School
Department of Chemistry
School of Sciences


E-Mail
Phone
092-642-2570
Fax
092-642-2570
Academic Degree
Dr. (Science)
Field of Specialization
Coordination Chemistry, Inorganic Chemistry
Outline Activities
Objectives: Creation of functional multi-nuclear complexes, coordination polymers and meso-scale metal complex - membrane composite.

Multi-nuclear complexes and Coordination polymers: Precise control of structure and properties, e.g. magnetic, dielectric, catalytic and porous properties. Elucidation of correlation between structure and properties. Switching and modulation of properties by external stimuli, e.g. light, pressure and chemicals.

Metal complex - membrane composite: Controlled formation of meso-sized metal complex crystals in the liposome. Control of acquisition and release of molecules in/on the membrane. Highly efficient catalytic activity.
Research
Research Interests
  • Creation and controlling functions of artificial and cell membrane-metal composites
    keyword : lipid membrane, vesicle, composite
    2009.04.
  • Creation and magnetic chemo-swiching of porous magnets
    keyword : porous magnets, chemo-switching
    2004.04.
  • Creation functional coordination polymers
    keyword : ccordination polymers
    2003.04.
  • Creation chiral magnets and their magneto-optical properties
    keyword : chiral magnets, magneto-optical properties
    2000.04.
  • Rational synthesis and controlling magnetic properties of molecular-based magnetc
    keyword : metal complex, molecular-based magnets, magnetism
    1994.04.
Academic Activities
Reports
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1. Hisashi Okawa, Masaaki Ohba,Structures and Magnetism of Cyanide-Bridged Bimetallic Compounds: Design and Complex-Based Magnetic Materials, 75, 1191-1203,Bull. Chem. Soc. Jpn.,2002.06.
2. Masaaki Ohba, Hisashi Okawa,Synthesis and Magnetism of Multi-dimensional Cyanide-bridged Bimetallic Assemblies,198, 313-328 ,Coord. Chem. Rev.,2000.01.
Papers
 Show All Papers >>
1. Milind Madhusudan Deshmukh, Masaaki OHBA, Susumu Kitagawa, Shigeyoshi Sakaki,Absorption of CO2 and CS2 into the Hofmann-Type Porous Coordination Polymer: Electrostatic versus Dispersion Interactions,J. Am. Chem. Soc.,Vol.135,No.12,pp.4840-4849,2013.03. .
2. Hisashi Ōkawa, Masaaki Sadakiyo, Teppei Yamada, Mitsuhiko Maesato, Masaaki OHBA, Hiroshi Kitagawa,Proton-Conductive Magnetic Metal-Organic Frameworks, {NR3(CH2COOH)}[(MaMbIII)-M-II(ox)(3)]: Effect of Carboxyl Residue upon Proton Conduction,J. Am. Chem. Soc.,Vol.135,No.6,pp.2256-2262,2013.02. .
3. Ryo Ohtani, Masashi Arai, Hisayoshi Ohba, Akihiro Hori, Masaki Takata, Susumu Kitagawa, Masaaki OHBA,Modulation of Spin-Crossover Behavior in an Elongated and Flexible Hofmann-Type Porous Coordination Polymer,Eur. J. Inorg. Chem.,Vol.23,No.1,pp.104-110,2013.01. .
4. Masaaki Sadakiyo, Hisashi Ōkawa, Akihito Shigematsu, Masaaki OHBA, Teppei Yamada, Hiroshi Kitagawa,Promotion of Low-Humidity Proton Conduction by Controlling Hydrophilicity in Layered Metal-Organic Frameworks,J. Am. Chem. Soc.,Vol.134,No.12,pp.5472-5475,2012.03. .
5. J. Alberto Rodríguez-Velamazán, Miguel A. González, José A. Real, Miguel Castro, M. Carmen Muñoz, Ana B. Gaspar, Ryo Ohtani, Masaaki OHBA, Ko Yoneda, Yuh Hijikata, Nobuhiro Yanai, Motohiro Mizuno, Hideo Ando, Susumu Kitagawa,A Switchable Molecular Rotator: Neutron Spectroscopy Study on a Polymeric Spin-Crossover Compound,J. Am. Chem. Soc.,Vol.134,No.11,pp.5083-5089,2012.03. .
6. Ryo Ohtani, Ko Yoneda, Shuhei Furukawa, Nao Horike, Susumu Kitagawa, Ana B. Gaspar, M. Carmen Muñoz, Jose A. Real, Masaaki OHBA,Precise Control and Consecutive Modulation of Spin Transition Temperature Using Chemical Migration in Porous Coordination Polymers,J. Am. Chem. Soc.,Vol.133,No.22,pp.8600-8605,2011.06. .
7. Ko Yoneda, Masaaki OHBA, Susumu Kitagawa,Guest-responsive porous magnetic frameworks using polycyanometallates,Crystengcomm,Vol.12,No.1,pp.159-165,12(1), 159-165,2010.01. .
8. Masaaki OHBA, Ko Yoneda, Gloria Agustí, M. Carmen Muñoz, Ana B. Gaspar, José A. Real, Mikio Yamasaki, Hideo Ando, Yoshihide Nakao, Shigeyoshi Sakaki, Susumu Kitagawa,Bidirectional Chemo-Switching of Spin State in a Microporous Framework,Angew. Chem.-Int. Edit.,Vol.48,No.26,pp.4767-4771,2009.03. .
9. Gloria Agustí, Ryo Ohtani, Ko Yoneda, Ana B. Gaspar, Masaaki OHBA, Juan F. Sánchez-Royo, M. Carmen Muñoz, Susumu Kitagawa, José A. Real,Oxidative Addition of Halogens on Open Metal Sites in a Microporous Spin-Crossover Coordination Polymer,Angew. Chem.-Int. Edit.,Vol.48,No.47,pp.8944-8947,2009.10. .
10. Hisashi Ōkawa, Akihito Shigematsu, Masaski Sadakiyo, Takuya Miyagawa, Ko Yoneda, Masaaki OHBA, Hiroshi Kitagawa,Oxalate-Bridged Bimetallic Complexes {NH(prol)(3)}[MCr(ox)(3)] (M = Mn-II, Fe-II, Co-II; NH(prol)(3)(+) = Tri(3-hydroxypropyl)ammonium) Exhibiting Coexistent Ferromagnetism and Proton Conduction,J. Am. Chem. Soc.,Vol.131,No.37,pp.13516-13522,2009.08. .
11. Nobuhiro Yanai, Takashi Uemura, Masaaki OHBA, Yu Kadowaki, Mitsuhiko Maesato, Mikihiko Takenaka, Shotaro Nishitsuji, Hirokazu Hasagawa, Susumu Kitagawa,Fabrication of Two-Dimensional Polymer Arrays: Template Synthesis of Polypyrrole between Redox-Active Coordination Nanoslits,Angew. Chem.-Int. Edit.,Vol.47,No.51,pp.9883-9886,2008.11. .
12. Sujit K. Ghosh, Wakako Kaneko, Daisuke Kiriya, Masaaki OHBA, Susumu Kitagawa,A Bistable Porous Coordination Polymer with a Bond-Switching Mechanism Showing Reversible Structural and Functional Transformations,Angew. Chem.-Int. Edit.,Vol.47,No.46,pp.8843-8847,2008.10. .
13. Masaaki OHBA, Wakako Kaneko, Susumu Kitagawa, Takuho Maeda, Masaki Mito,Pressure response of three-dimensional cyanide-bridged bimetallic magnets,J. Am. Chem. Soc.,Vol.130,No.13,pp.4475-4484,2008.04. .
14. Wakako Kaneko, Masaaki OHBA, Susumu Kitagawa,A flexible coordination polymer crystal providing reversible structural and magnetic conversions,J. Am. Chem. Soc.,Vol.129,No.44,pp.13706-13712,2007.11. .
15. Nobuhiro Yanai, Wakako Kaneko, Ko Yoneda, Masaaki OHBA, Susumu Kitagawa,Reversible water-induced magnetic and structural conversion of a flexible microporous Ni(II)Fe(III) ferromagnet,J. Am. Chem. Soc.,Vol.129,No.12,pp.3496-+,2007.03. .
16. Wakako Kaneko, Susumu Kitagawa, Masaaki OHBA,Chiral cyanide-bridged (MnMnIII)-Mn-II ferrimagnets, [Mn-II(HL)(H2O)][Mn-III(CN)(6)]center dot 2H(2)O (L = S- or R-1,2-diaminopropane): Syntheses, structures, and magnetic behaviors,J. Am. Chem. Soc.,Vol.129,No.2,pp.248-249,2007.01. .
17. Takuya Shiga, Hisashi Ōkawa, Susumu Kitagawa, Masaaki OHBA,Stepwise synthesis and magnetic control of trimetallic magnets [Co(2)Ln(L)(2)(H2O)(4)][Cr(CN)(6)]center dot nH(2)O (Ln = La, Gd; H2L=2,6-di(acetoacetyl)pyridine) with 3-D pillared-layer structure,J. Am. Chem. Soc.,Vol.128,No.51,pp.16426-16427,2006.12. .
Membership in Academic Society
  • Japan Society of Coordination Chemistry
  • The Chemical Society of Japan
  • The American Chemical Society
  • Japan Society for Molecular Science
  • The Society of Polymer Science, Japan
  • The Rare Earth Society of Japan
Awards
  • Rational synthesis and magnetic and magneto-optical properties of molecular-based magnets
  • A Bimetallic Magnetic System Exhibiting Reversible Ferromagnetism/Metamagnetism Modulation
  • [Mn(en)]3[Cr(CN)6]2.4H2O: A Three-Dimensional Dimetallic Ferrimagnet (Tc=69K) with a Defective Cubane Unit
  • Rational synthesis and magnetic properties of 1-3 dimensional cyanide-bridged bimetallic assemblies
  • Studies on one- and two-dimensional bimetallic assemblies extended through M(III)-CN-Ni(II) linkages


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