1. U.S. Army Research Laboratory, 2800 Powder Mill Rd., Adelphi, Maryland 20783
2. Department of Chemistry, University of Oslo, Sem Sælands vei 26, 0371 Oslo, Norway
3. General Technical Services, LLC, 1451 Route 34 South—Suite 301, Wall Township, New Jersey 07727
4. Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742