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


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

SUBMITTER: Dong R 

PROVIDER: S-EPMC6035257 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature

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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<sup>-3</sup> S cm<sup>-1</sup>) 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 lin  ...[more]

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