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Issue 3, 2018
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Switching single chain magnet behavior via photoinduced bidirectional metal-to-metal charge transfer

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Abstract

The preparation of single-chain magnets (SCMs) with photo-switchable bistable states is essential for the development of high-density photo-recording devices. However, the reversible switching of the SCM behavior upon light irradiation is a formidable challenge. Here we report a well-isolated double zigzag chain {[Fe(bpy)(CN)4]2[Co(phpy)2]}·2H2O (bpy = 2,2′-bipyridine, phpy = 4-phenylpyridine), which exhibits reversible redox reactions with interconversion between FeIIILS(μ-CN)CoIIHS(μ-NC)FeIIILS (LS = low-spin, HS = high-spin) and FeIIILS(μ-CN)CoIIILS(μ-NC)FeIILS linkages under alternating irradiation with 808 and 532 nm lasers. The bidirectional photo-induced metal-to-metal charge transfer results in significant changes of anisotropy and intrachain magnetic interactions, reversibly switching the SCM behavior. The on-switching SCM behavior driven by light irradiation at 808 nm could be reversibly switched off by irradiation at 532 nm. The results provide an additional and independent way to control the bistable states of SCMs by switching in the 0 → 1 → 0 sequence, with potential applications in high density storage and molecular switches.

Graphical abstract: Switching single chain magnet behavior via photoinduced bidirectional metal-to-metal charge transfer

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Supplementary files

Article information


Submitted
04 Aug 2017
Accepted
30 Oct 2017
First published
30 Oct 2017

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2018,9, 617-622
Article type
Edge Article

Switching single chain magnet behavior via photoinduced bidirectional metal-to-metal charge transfer

W. Jiang, C. Jiao, Y. Meng, L. Zhao, Q. Liu and T. Liu, Chem. Sci., 2018, 9, 617
DOI: 10.1039/C7SC03401F

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    [Original citation] - Published by The Royal Society of Chemistry.

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