Institution: | 1. Chemical Resources Laboratory, Tokyo Institute of Technology, R1‐27, 4259 Nagatsuta, Midori‐ku, Yokohama 226‐8503 (Japan), Fax: (+81)?45‐924‐5230;2. UMR CNRS 6226 Sciences Chimiques de Rennes, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes (France) |