1. Department of Chemistry, National Tsing Hua University, 300 Hsinchu, Taiwan, Department of Chemistry and Instrumentation Center, National Taiwan University, 106 Taipei, Taiwan, Institute for Microstructural Sciences and Steacie Institute for Molecular Sciences, National Research Council of Canada, Ontario K1A 0R6, Canada, and Department of Applied Chemistry, National Chiao Tung University, 300 Hsinchu, Taiwan