1. The Laboratory of Photochemistry, Center for Molecular Science, Institute of Chemistry, The Chinese Academy of Science, 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, Montreal, Canada H3G 1M8