J. L. Silva, I. Unger, T. A. Matias, L. R. Franco, G. Damas, L. T. Costa, K. C. F. Toledo, T. C. R. Rocha, A. N. de Brito, C.-M. Saak, K. Coutinho, K. Araki, O. Björneholm, B. Brena and C. M. Araujo. X-ray photoelectron fingerprints of high-valence rutheniumoxo complexes along the oxidation reaction pathway in an aqueous environment, Journal of Physical Chemistry Letters 10, 7636–7643 (2019).