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Two azido-bridged homospin Fe(ii)/Co(ii) coordination polymers featuring single-chain magnet behavior
Jiong Yang1, Yi-Fei Deng1, Yuan-Zhu Zhang1
1Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, P. R. China. zhangyz@sustech.edu.cn dengyf@sustech.edu.cn.
Abstract:
Two azido-bridged homospin Fe(ii)/Co(ii) coordination polymers [Fe2(Bzp)2(N3)4]n (1) and [Co4(Bzp)4(N3)8·(MeOH)2]n (2) (bzp = 2-benzoylpyridine) are prepared, which consist of one-dimensional neutral chains with pure EO-azido (μ2-1,1-N3) bridges. Magnetically, both 1 and 2 exhibit considerable intrachain ferromagnetic interactions which benefit from the EO-azido bridging mode, leading to typical single-chain magnet (SCM) behavior under both the "infinite-size" and "finite-size" regime and pronounced hysteresis loops. As far as the bridging network is concerned, complex 1 represents not only a rare example of homospin Fe(ii)-based SCMs but also the first Fe(ii) chain compound with pure EO-azido bridges.
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