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Dong, Renhao; Zhang, Zhitao; Tranca, Diana C; Zhou, Shengqiang; Wang, Mingchao; Adler, Peter; Liao, Zhongquan; Liu, Feng; Sun, Yan; Shi, Wujun; Zhang, Zhe; Zschech, Ehrenfried; Mannsfeld, Stefan C B; Felser, Claudia; Feng, Xinliang
Nature communications, 07/2018, Volume: 9, Issue: 1Journal Article
Metal-organic frameworks (MOFs) have so far been highlighted for their potential roles in catalysis, gas storage and separation. However, the realization of high electrical conductivity (>10 S cm ) and magnetic ordering in MOFs will afford them new functions for spintronics, which remains relatively unexplored. Here, we demonstrate the synthesis of a two-dimensional MOF by solvothermal methods using perthiolated coronene as a ligand and planar iron-bis(dithiolene) as linkages enabling a full π-d conjugation. This 2D MOF exhibits a high electrical conductivity of ~10 S cm at 300 K, which decreases upon cooling, suggesting a typical semiconductor nature. Magnetization and Fe Mössbauer experiments reveal the evolution of ferromagnetism within nanoscale magnetic clusters below 20 K, thus evidencing exchange interactions between the intermediate spin S = 3/2 iron(III) centers via the delocalized π electrons. Our results illustrate that conjugated 2D MOFs have potential as ferromagnetic semiconductors for application in spintronics.
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