1. Department of Chemistry, Faculty of Science, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, Japan, Facolta di Farmacia, Università degli Studi “G. D'Annunzio”, I-66100 Chieti, Italy, Faculty of Chemistry, University of Wroclaw, 14, F. Joliot-Curie, 50-383 Wroclaw, Poland, IPCMS, UMR7504, 23 rue du Loess, BP 43, 67034 Strasbourg Cedex 2, France, BESSY, Albert-Einstein-Str. 15, 12489 Berlin, Germany, and CRTBT-CNRS, BP166, 38042 Grenoble Cedex 9, France