1. U.S. Army Combat Capabilities Development Command Chemical Biological Center, Research & Technology Directorate, Aberdeen Proving Ground, Maryland 21010, United States
2. Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
3. Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, United States
4. Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, United States
5. Survice Engineering Company, U.S. Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, United States