1. Actinium Chemical Research Institute, Rome, Italy;
2. Laboratory of Structural and Computational Physical-Chemistry for Nanosciences and QSAR, Biology-Chemistry Department, West University of Timisoara, Timisoara, RO, Romania;
3. Laboratory of Renewable Energies-Photovoltaics, R&D National Institute for Electrochemistry and Condensed Matter, Timisoara, RO, Romania