1. Department
of Chemistry, University of Guelph, Guelph, Ontario, Canada N1G 2W1
2. Clermont
Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France
3. CNRS, UMR 6296,
ICCF, BP 80026, F-63171 Aubière, France