A coronene-based semiconducting two-dimensional metal-organic framework with ferromagnetic behavior

作者：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^*

来源：Nature Communications, 2018, 9(1): 2637.

DOI：10.1038/s41467-018-05141-4

• TEMPERATURE FERROMAGNETISM
• ELECTRICAL-CONDUCTIVITY
• ELECTRONIC-STRUCTURE
• MAGNETORESISTANCE
• COMPLEXES
• VALENCE
• DESIGN

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(-3) S cm(-1)) 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 pi-d conjugation. This 2D MOF exhibits a high electrical conductivity of similar to 10 S cm(-1) at 300 K, which decreases upon cooling, suggesting a typical semiconductor nature. Magnetization and Fe-57 Mossbauer 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 pi electrons. Our results illustrate that conjugated 2D MOFs have potential as ferromagnetic semiconductors for application in spintronics.

• 出版日期2018-7-6
• 单位西安交通大学