Modulation of the molecular spintronic properties of adsorbed copper corroles

Fan Wu, Jie Liu, Puneet Mishra, Tadahiro Komeda (), John Mack, Yi Chang, Nagao Kobayashi and Zhen Shen ()
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Fan Wu: State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University
Jie Liu: Institute of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University
Puneet Mishra: Institute of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University
Tadahiro Komeda: Institute of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University
John Mack: Rhodes University
Yi Chang: State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University
Nagao Kobayashi: Graduate School of Science, Tohoku University
Zhen Shen: State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract The ability to modulate the spin states of adsorbed molecules is in high demand for molecular spintronics applications. Here, we demonstrate that the spin state of a corrole complex can be tuned by expanding its fused ring as a result of the modification to the d–π interaction between the metal and ligand. A bicyclo[2.2.2]octadiene-fused copper corrole can readily be converted into a tetrabenzocorrole radical on an Au(111) substrate during the sublimation process. In the scanning tunnelling spectroscopy spectrum, a sharp Kondo resonance appears near the Fermi level on the corrole ligand of the tetrabenzocorrole molecule. In contrast, a non-fused-ring-expanded copper corrole molecule, copper 5,10,15-triphenylcorrole, shows no such Kondo feature. Mapping of the Kondo resonance demonstrates that the spin distribution of the tetrabenzocorrole molecule can be further modified by the rotation of the meso-aryl groups, in a manner that could lead to applications in molecular spintronics.

Date: 2015
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DOI: 10.1038/ncomms8547

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