1. Chemistry
Department, Brookhaven National Laboratory, Upton, New York 11973, United States
2. Departamento
de Química Física, Universidad de Sevilla, 41012 Sevilla, Spain
3. Department
of Chemistry, State University of New York (SUNY) at Stony Brook, Stony Brook, New York 11794, United States
4. Facultad
de Ciencias, Universidad Central de Venezuela, Caracas 1020 A, Venezuela