1. Department of Chemistry and Biochemistry; Florida International University; Modesto Maidique Campus, CP304-11200 SW 8th St. Miami FL 33199 USA
2. Department of Chemistry; University of North Carolina at Chapel Hill; Campus Box 3290 Chapel Hill NC 27599-3290 USA
3. Department of Chemistry; Texas Christian University; TCU Box 298860 Fort Worth TX 76129 USA