1. Laboratory of Photochemistry, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
2. Frontier Research Center for the Global Environment Protection, Meisei University, 2-1-1 Hodokubo, Hino, Tokyo 191, Japan
3. Department of Chemistry and Biochemistry, Concordia University, 1455 deMaisonneuve Boulevard West, Montreal, Quebec, Canada H3G 1M8