Surface-supported hydrocarbon π radicals show Kondo behavior

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Abstract

Stable hydrocarbon radicals are utilized as spin standards and prototype metal-free molecular magnets able to withstand ambient conditions. Our study presents experimental results obtained with submolecular resolution by scanning tunneling microscopy and spectroscopy from monomers and dimers of stable hydrocarbon π radicals adsorbed on the Au(111) surface at 7-50 K. We provide conclusive evidence of the preservation of the radical spin-1/2 state, aiming to establish α,γ-bisdiphenylene-β-phenylallyl (BDPA) on Au(111) as a novel Kondo system, where the impurity spin is localized in a metal-free π molecular orbital of a neutral radical state in gas phase preserved on a metal support. © 2013 American Chemical Society.

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Müllegger, S., Rashidi, M., Fattinger, M., & Koch, R. (2013). Surface-supported hydrocarbon π radicals show Kondo behavior. Journal of Physical Chemistry C, 117(11), 5718–5721. https://doi.org/10.1021/jp310316b

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