*
Corresponding authors
a
Department of Chemistry, University of New Brunswick, Post Office Box 45222, Fredericton, New Brunswick, Canada
E-mail:
passmore@unb.ca
b
Nitrogen Fixation Laboratory, John Innes Centre, Norwich, UK
c
Department of Chemistry and Physics, and Advanced Carbon Materials Center, University of Kentucky, Lexington, Kentucky, USA
d
Institut fur Physikalische und Theoretische Chemie, Universitat Tuebingen, Auf der Morganstralle 8, Tuebingen 1, Germany
e
Department of Chemistry, University of Edinburgh, Edinburgh, UK
f
Department of Science, Atlantic Baptist University, P.O. Box 6004, Moncton, New Brunswick, Canada
g
Chemistry and Physics Departments, University of Surrey, Guildford, Surrey, UK
h
Department of Chemistry and Biochemistry, University of Guelph, Guelph, Ontario, Canada