1. Sandia National Laboratories, 1515 Eubank SE, Albuquerque, New Mexico 87123, USA
2. Leidos Corp, P. O. Box 68, Edgewood Chemical Biological Center, Aberdeen Proving Ground, Maryland 21010, USA
3. Oregon State University, Department of Chemistry, 153 Gilbert Hall, Corvallis, Oregon 97331‐4003, USA, http://chem.science.oregonstate.edu/nyman
4. U. S. Army Natick Soldier Research, Development & Engineering Center, 15 Kansas Street, Natick, Massachusetts 01760‐5020, USA