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JST Press Release

April 11, 2017
Japan Science and Technology Agency (JST)
5-3, Yonbancho, Chiyoda-ku, Tokyo 102-8666

Solid material showing switchable ion transport by light irradiation

Toward ionics-based memory and transistor devices

Solid-state ion transporting materials are becoming more important for energy devices such as battery and fuel cell. Not only the demands of the fast and stable ion transport for these application, the switching of ion transport activity by external stimuli is also challenging toward various ionics-based technologies.

For the rational synthesis of light triggered ion transporting materials in solid state, researchers used metal-organic coordination polymer (CP) which shows crystal melting behaviour, and they doped photo acid molecule pyranine to get light responsive ion conducting material. The pyraine-doped CP crystal and glass represent fast proton (H+) transport, and ON/OFF switching of H+ transport in the solid state was achieved by light irradiation. The materials would be a platform of ionics-based transistor or memory devices.

Program Information

Research Area “Molecular Technology” (JST-ANR Coordinated Research)
Research Theme “Molecular Memory with Phase Change Coordination Polymers for future PCRAM”

Journal Information

Sanjog S. Nagarkar, Satoshi Horike, Tomoya Itakura, Benjamin Le Ouay, Aude Demessence, Masahiko Tsujimoto and Susumu Kitagawa. “Enhanced and Optically Switchable Proton Conductivity in a Melting Coordination Polymer Crystal”. Angewandte Chemie International Edition, Published online 10 April 2017, doi: 10.1002/anie.201700962.


[About Research]
Satoshi HORIKE, Ph.D.
Associate Professor, Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University

[About Program]
Department of International Affairs , JST


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