Indexed by:Journal Article

Date of Publication:2018-01-21

Journal:CHEMICAL SCIENCE

Included Journals:EI、SCIE、PubMed、ESI高被引论文

Volume:9

Issue:3

Page Number:617-622

ISSN:2041-6520

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)]}center dot 2H(2)O (bpy = 2,2'-bipyridine, phpy = 4-phenylpyridine), which exhibits reversible redox reactions with interconversion between Fe-LS(III)(mu-CN) Co-HS(II)(mu-NC) Fe-LS(III) (LS = low-spin, HS = high-spin) and Fe-LS(III) (mu-CN) Co-LS(III) (mu-NC) Fe-LS(II) 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.