1. Department of Chemistry & Biochemistry, University of Mississippi, University, Mississippi 38655-1848, United States
2. Department of Chemistry & Biochemistry, Georgia Southern University, Statesboro, Georgia 30460, United States
3. MS 245-3 NASA Ames Research Center, Moffett Field, California 94035-1000, United States
4. Bay Area Environmental Research Institute, Petaluma, California 94952, United States
5. IBM Almaden Research Center, IBM Research, 650 Harry Road, San Jose, California 95120, United States