1. Department of Physics, Dalian Maritime University, Dalian 116023, China
2. Department of Chemistry and Biochemistry, Florida International University, Miami, Florida 33199
3. Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei 10764, Taiwan
4. Institute of Physical and Theoretical Chemistry, Technical University of Munich, Garching, 84748, Germany
5. Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei 10764, Taiwan, and Department of Applied Chemistry, National Chiao-Tung University, Hsin-chu, Taiwan