1. Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts
Avenue, Cambridge, Massachusetts 02139, United States
2. Department of Physical Chemistry, Universidad de Alcalá, Ctra. Madrid-Barcelona
Km. 33,600, Madrid 28871, Spain
3. Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts
02155, United States
4. Department
of Chemistry, University of Miami, 1301
Memorial Drive, Coral Gables,
Florida 33021, United States