1. Institute of Inorganic Chemistry I, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
2. Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
3. Leibniz Institute of Photonic Technologies (IPHT), Albert-Einstein-Straße 9, 07745 Jena, Germany