1. Department of Chemistry, The George Washington University, 800 22nd Street NW, Washington, D.C. 20052, United States
2. Department of Fundamental Chemistry Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, São Paulo, SP 05508-000, Brazil
3. Department of Chemistry, University at Buffalo, State University of New York, 312 Natural Sciences Complex, Buffalo, New York 14260, United States
4. Department of Chemistry, Hampden-Sydney College, Hampden-Sydney, Virginia 23943, United States