1. Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, United States
2. Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208-3113, United States
3. Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United
States
4. Department of Chemistry, Trinity College, 300 Summit Street, Hartford, Connecticut
06106, United States