Magnetic and Electrochemical Properties of a TEMPO-Substituted Disulfide Diradical in Solution, in the Crystal, and on a Surface

Vega Lloveras, Elena Badetti, Klaus Wurst, Victor Chechik, Jaume Veciana, José Vidal-Gancedo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A study of the magnetic and electrochemical properties of a TEMPO-substituted disulfide diradical in three different environments was carried out: in solution, in the crystal, and as a self-assembled monolayer (SAM) on an Au(111) substrate, and the relationship between them was explored. In solution, this flexible diradical shows a strong spin-exchange interaction between the two nitroxide functions that depends on the temperature and solvent. Structural, dynamic, and thermodynamic information has been extracted from the EPR spectra of this dinitroxide. The magnetic interactions in the crystal include intra- and intermolecular contributions, which have been studied separately and shown to be antiferromagnetic in both cases. Finally, we demonstrate that both the magnetic and electrochemical properties are preserved upon chemisorption of the diradical on a gold surface. The resulting SAM displayed anisotropic magnetic properties, and angle-resolved EPR spectra of the monocrystal allowed a rough determination of the orientation of the molecules in the SAM.

Original languageEnglish
Pages (from-to)1805-1815
Number of pages11
JournalChemistry : A European Journal (Weinheim an der Bergstrasse, Germany)
Issue number5
Early online date7 Jan 2016
Publication statusPublished - 26 Jan 2016

Bibliographical note

© 2016 Wiley-VCH. This is an author produced version of a paper accepted for publication in Chemistry a European Journal. Uploaded in accordance with the publisher's self-archiving policy.


  • diradicals
  • EPR spectroscopy
  • intramolecular spin-exchange interaction
  • self-assembled monolayers
  • X-ray diffraction

Cite this