Abstract
WITHDRAWN TO APPEAR IN SPECIAL ISSUE IN 2007
Acknowledgements
Financial support for this work was provided by the Natural Sciences and Engineering Research Council (NSERC) of Canada. The authors would like to thank Dr K. A. Walker for the loan of her Nd:YAG laser while ours was being repaired.
Notes
†Current Address: Department of Chemistry and Biochemistry, Canisius College, Buffalo, NY 14208, USA
‡Current Address: Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK