1. M. Smoluchowski Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków, Poland
2. EPR4Energy Joint Lab, Department Spins in Energy Conversion and Quantum Information Science, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 16, 12489 Berlin, Germany
3. Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, 07743 Jena, Germany
4. Institute of Inorganic Chemistry, Kiel University, Max-Eyth-Straße 2, 24118 Kiel, Germany
5. EPR Research Group, Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim Ruhr, Germany