1. Department of Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
2. W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
3. Mechanical Engineering, Purdue Energetics Research Center, Purdue University, West Lafayette, Indiana 47907, United States
4. Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
5. Department of Chemistry, MIT, Cambridge, Massachusetts 02139, United States