1. Department
of Chemistry, University of Victoria, Victoria, British Columbia V8W 3V6, Canada
2. Department
of Chemistry, Dalhousie University, Halifax, Nova Scotia B3H 4J3, Canada
3. Department
of Chemistry, University of New Brunswick, Fredericton, New Brunswick E3A 6E2, Canada
4. Department
of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada