A light-induced spin crossover actuated single-chain magnet

Tao Liu (), Hui Zheng, Soonchul Kang, Yoshihito Shiota, Shinya Hayami, Masaki Mito, Osamu Sato, Kazunari Yoshizawa, Shinji Kanegawa and Chunying Duan
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Tao Liu: State Key Laboratory of Fine Chemicals, Dalian University of Technology
Hui Zheng: State Key Laboratory of Fine Chemicals, Dalian University of Technology
Soonchul Kang: Institute for Materials Chemistry and Engineering, Kyushu University
Yoshihito Shiota: Institute for Materials Chemistry and Engineering, Kyushu University
Shinya Hayami: Graduate School of Science and Technology, Kumamoto University
Masaki Mito: Faculty of Engineering, Kyushu Institute of Technology
Osamu Sato: Institute for Materials Chemistry and Engineering, Kyushu University
Kazunari Yoshizawa: Institute for Materials Chemistry and Engineering, Kyushu University
Shinji Kanegawa: Institute for Materials Chemistry and Engineering, Kyushu University
Chunying Duan: State Key Laboratory of Fine Chemicals, Dalian University of Technology

Nature Communications, 2013, vol. 4, issue 1, 1-7

Abstract: Abstract Both spin-crossover complexes and molecular nanomagnets display bistable magnetic states, potentially behaving as elementary binary units for information storage. It is a challenge to introduce spin-crossover units into molecular nanomagnets to switch the bistable state of the nanomagnets through external stimuli-tuned spin crossover. Here we report an iron(II) spin-crossover unit and paramagnetic iron(III) ions that are incorporated into a well-isolated double-zigzag chain. The chain exhibits thermally induced reversible spin-crossover and light-induced excited spin-state trapping at the iron(II) sites. Single-chain magnet behaviour is actuated accompanying the synergy between light-induced excited spin-state trapping at the iron(II) sites and ferromagnetic interactions between the photoinduced high-spin iron(II) and low-spin iron(III) ions in the chain. The result provides a strategy to switch the bistable state of molecular nanomagnets using external stimuli such as light and heat, with the potential to erase and write information at a molecular level.

Date: 2013
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DOI: 10.1038/ncomms3826

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