1. Department of Chemistry, University of Hawaii, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
2. W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii, Honolulu, Hawaii 96822, United States
3. Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan
4. Department of Chemistry and Biochemistry, Florida International University, Miami, Florida 33199, United States