1. State Key Laboratory of Rare Earth Resource
Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
2. University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
3. Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, 263 Avenue du General Leclerc, 35042 Rennes Cedex, France