Institute for Materials Research (IMR), Tohoku University

Miyasaka Laboratory 

Division of Solid-State Metal-Complex Chemistry, IMR
Department of Chemistry, Graduate School of Science, Tohoku University

Let's Enjoy Science in Miyasaka Group!

 Welcome to Miyasaka Group

We are studying on solid-state physical chemistry based on metal complexes (i.e., coordination compounds), in which our goal is directed to the synergistic control of charge, electronic and magnetic properties, and lattice in molecular frameworks, and finally, to the creation of new soft molecular materials with unique phenomena. The techniques of crystal engineering or molecular self-assembling with metal complexes enables us to create diverse molecular frameworks and supramolecular architectures. Of course, many of metal complexes have such fascinating traits as high redox activity, high charge-transfer activity between metal ion and ligands, and paramagnetism with a large anisotropy controllable by ligand-fields around metal ion chosen. So, we will be able to tune these characteristics using metal complexes and be ableto design “functional” and “dynamical” molecular frameworks as if they were simply constructed by Lego blocks. “Molecules” including metal complexes have the high design performance and flexibility in their type diversity, so it is our new challenge to manipulate on-demand electrons/spins in multi-dimensional metal-complex frameworks.
Enjoy our researches and welcome to the leading-laboratory for solid-state metal-complex chemistry!

 About “KINKEN”

What is “KINKEN”? What is IMR? Probably, most of chemists do not know about “KINKEN, IMR.” IMR is one of the leaders in the world in a wide field of researches on solid-state materials and their properties, for example, metallic materials, oxides, ceramics, semiconductor materials, hydrogen adsorbing materials, nuclear materials, biomaterials, and unique functional materials toward the next-generation electronic materials such as spintronic materials, strongly correlated materials, optical device materials, and organic materials. IMR is always transmitting information on unique materials, technologies, and science toward the rest of the world based on our knowledge and skills obtained by merging of basic and applied sciences, and science and engineering.See HP for IMR

 Are you interested in our work?

If you are interested in our work, let's join us. At first, contact us by e-mail.


Dependent on the situation. Not available now.

Graduate students (Master’s Program and Doctoral Program) and IGPAS program with a financial support:

NOW WANTED!! Graduate School of Science and Faculty of Science at Tohoku University has a program for international graduate students, IGPAS (International Graduate Program for Advanced Science), where candidates chose either Master’s Program (5 years = 2M+3D) or Doctoral Program (3 years). Note that the students can have a financial support from Japanese government (MEXT) scholarship. The application period will be given in November, every year, so if you wish to have this program, contact us as soon as possible.
See the detail of it on the web site:
Of course, we are always welcome you as self-supporting international graduate students.

 International Research Collaboration with Miyasaka Lab

Financial supports for your collaboration research (supports for your travel and living fees)

IMR, as a world-class Center Of Excellence (COE) for Material Science, has provided open (management/ operation) for researchers in Japan and all around the world. By providing advanced technology research equipment in large and unique facilities to university/research organization researchers, has contributed to promotion of Material Science research and development of research communities in Japan. As a COE in material research, this institute has achieved a social task by widely publishing the results of collaboration research. In recent years, much effort has been put into international collaboration research, due to the globalization of research in this field. To take this collaboration one step further and to strength the international presence as a world-class COE, this institute is launching international collaboration research program.

If you wish to do a collaboration with our group, please contact me (Prof. Miyasaka, E-mail:
 Please see the guidline. Application-guideline_E_20151112.pdf
 See URL to know the details on ICC-IMR program
 You can get application forms for projects from URL; Application Form
 Please make an application form and send us it. If you have any question, let me know.


Artworks in Chemistry

Drastic trigger: electron transfer from framework to guest

A Host-Guest Electron Transfer Mechanism for Magnetic and Electronic Modifications in a Redox-Active Metal-Organic Framework
J. Zhang, W. Kosaka, Y. Kitagawa, and H. Miyasaka, Angew. Chem. Int. Ed.2022, in press.
See the journal page

D/A-MOFs of [Ru2] and DCNQI/TCNQ

Charge Manupulation in Metal-Organic Frameworks: Toward Designer Functional Molecular Materials
H. Miyasaka, Bull. Chem. Soc. Jpn.2021, 94, 2929-2955.
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Hydrogen bond magic

Role of intramolecular hydrogen bonding in the redox chemistry of hydroxybenzoate-bridged paddlewheel diruthenium(II, II) complexes
W. Kosaka, Yudai Watanabe, Kinanti Hantiyana Aliyah, H. Miyasaka, Dalton Trans.2022, 51, 85-94.
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Creating magnets from a non-magnet

Magnet Creation by Guest Insertion into a Paramagnetic Charge-Flexible Layered Metal-Organic Framework
J. Zhnag, W. Kosaka, Hiroyasu Sato, H. Miyasaka, J. Am. Chem. Soc.2021, 143, 7021-7031.
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Manipulation of charge in frameworks?

Ionicity Diagrams for Electron-Donor and Acceptor Metal-Organic Frameworks: DA Chains and D2A Layers Obtained from Paddlewheel-Type Diruthenium(II,II) Complexes and Polycyano-Organic Acceptors
Y. Sekine, M. Nishio, T. Shimada, W. Kosaka, H. Miyasaka, Inorg. Chem.2021, 60, 3046-3056.
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Change its electronic state like a chameleon

Chameleonic layered metal-organic frameworks with variable charge-ordered states triggered by temperature and guest molecules
J. Chen, Y. Sekine, A. Okazawa, H. Sato, W. Kosaka, H. Miyasaka, Chem. Sci.2020, 11, 3610-3618.
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Gate-control for gases

Control of Gas Sorption Gate-opening in Solid Solutions of One-dimensional Coordination Polymers
J. Zhang, W. Kosaka, H. Miyasaka, Chem. Lett.2019, 48, 1308-1311.
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Let's look at inside of nano-pores, what happen?

In SituTracking of Dynamical NO Capture through a Crystal-to-Crystal Transformation from a Gate-Open-Type Chain Porous Coordination Polymer to an NO-Adducted Discrete Isomer
J. Zhang, W. Kosaka, S. Kitagawa, M. Takata, H. Miyasaka, Chem. Eur. J.2018, 25, 3020-3031.
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For Understanding magnetism in layered magnets

Layered ferrimagnets constructed from charge-transferred paddlewheel [Ru2] units and TCNQ derivatives: the importance of interlayer translational distance in determining magnetic ground state
W. Kosaka, Z. Liu, H. Miyasaka, Dalton Trans.2018, 47, 11760-11768.
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Breaking the spin singlet in TTF-TCNQ

Magnetic Switching by the In Situ Electrochemical Control of Quasi-Spin-Peierls Singlet States in a Tree-Dimensional Spin Lattice Incorporating TTF-TCNQ Salts
H. Fukunaga, M. Tonouchi, K. Taniguchi, W. Kosaka, S. Kimura, H. Miyasaka, Chem. Eur. J.2018, 24, 4294-4303.
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Magnetic Switching in LIB

In Situ Reversible Ionic Control for Non-Volatile Magnetic Phases in a Donor/Acceptor Metal–Organic Framework
K. Taniguchi, K. Narushima, H. Sagayama, W. Kosaka, N. Shito, H. Miyasaka, Adv. Func. Mater.2017,27, 1604990 (1-10).
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Anthracene locks the lattice

Crystal-to-crystal transformation of fishnet-like layered compounds: a self-locking structure with position-variable intercalated molecules
M. Nishio, N. Motokawa, H. Miyasaka, CrystEngComm2015,17, 7618–7622.
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A nobel charge-ordered state

A charge-disproportionated ordered state with δ = 0.75 in a chemically sensitive donor/acceptor Dδ+2A2δ– layered framework
H. Fukunaga, T. Yoshino, H. Sagayama, J. Yamaura, T. Arima, W. Kosaka, H. Miyasaka, Chem. Commun.2015,51, 7795–7798.
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Cleate new molecular magnets


H. Fukunaga, H. Miyasaka, 月刊「化学」 2015,70, 27-32.

CO2 uptake in [Ru2] chains

CO2 superadsorption in a paddlewheel-type Ru dimer chain compound: gate-open performance dependent on inter-chain interactions
W. Kosaka, K. Yamagishi, H. Yoshida, R. Matsuda, S. Kitagawa, M. Takata, H. Miyasaka,Chem. Commun.2013,49, 1594–1596.
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Change by pressure

Pressure effect on the three-dimensional charge-transfer ferromagnet [{Ru2(m-FPhCO2)4}2(BTDA-TCNQ)]
N. Motokawa, H. Miyasaka, M. Yamashita,Dalton Trans.2010,39, 4724–4726.
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Donor/acceptor ladder chains

A ladder based on paddlewheel diruthenium(II, II) rails connected by TCNQ rungs: a polymorph of the hexagonal 2-D network phase
N. Motokawa, T. Oyama, S. Matsunaga, H. Miyasaka, K. Sugimoto, M. Yamashita, N. Lopez, K. R. Dunbar, Dalton Trans. 2008, 4099–4102.
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From quantum regime to continuous regime

A look at molecular nanosized magnets from the aspect of inter-molecular interaction
H. Miyasaka, M. Yamashita, Dalton Trans. 2007, 399–406 (Frontiers).
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SCMs from donor/acceptor building blocks

Single-Chain Magnet Behavior in an Alternated One-Dimensional Assembly of MnIII Schiff-Base Complex and TCNQ Radical
H. Miyasaka, T. Madanbashi, K. Sugimoto, Y. Nakazawa, W. Wernsdorfer, K. Sugiura, M. Yamashita, C. Coulon, R. Clérac, Chem. Eur. J.2006, 12, 7028–7040.
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