1. Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA
2. Institute for Computational Molecular Science, Temple University, Philadelphia, Pennsylvania 19122, USA
3. Department of Materials Chemistry, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
4. U.S. Army Research Laboratory, Aberdeen Proving Ground, Aberdeen, Maryland 21005, USA