Dimerized p-Semiquinone Radical Anions Stabilized by a Pair of Rare-Earth Metal Ions

Research output: Contribution to journalArticle

  • External authors:
  • Tian Han
  • Jonatan B. Petersen
  • Zi-han Li
  • Yuan-qi Zhai
  • Andreas Kostopoulos
  • Fabrizio Ortu
  • Yan-zhen Zheng


Here we report stable p-quinone-radical-bridged rare-earth complexes involving the ligand tetramethylquinone (QMe4•–). The complexes, {Y[(QMe4)•–Cl2(THF)3]}2 (1) and {Gd[(QMe4)•–Cl2(THF)3]}2 (2), where THF = tetrahydrofuran, are sufficiently stable that we can measure the single-crystal structures and perform magnetic and electron paramagnetic resonance measurements. These studies show the presence of a semiquinone form and that the magnetic interaction between the radicals in the dimer is strong and antiferromagnetic.

Bibliographical metadata

Original languageEnglish
JournalInorganic Chemistry
Early online date11 May 2020
Publication statusE-pub ahead of print - 11 May 2020