1. Department of Chemistry, Faculty of Sciences, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, Japan, Institute of Applied Physics, Academy of Sciences of Moldova, Academiei str. 3. 2028 Chisinau, Moldova, Laboratoire de Chimie de Coordination, UPR 8241 CNRS, 205 Route de Narbonne, F-31077 Toulouse Cedex, France, and Laboratoire de Physique des Solides de Toulouse, UMR 5477 CNRS, 118 Route de Narbonne, F-31062 Toulouse Cedex, France