1. College of Physics and Electronics, Shandong Normal University, Jinan 250014, Shandong, China
2. Faculté des Sciences, des Technologies et de Médecine, Département Physique et sciences des matériaux, Campus Limpertsberg, Université du Luxembourg 162 A, avenue de la, Faïencerie L-1511, Luxembourg
3. Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok krt. 2, H-1117 Budapest, Hungary
4. Department of General and Inorganic Chemistry, University of Pannonia, Egyetem utca 10, Veszprém, H-8200, Hungary