1. Department of Chemistry, University of St. Andrews, St. Andrews, Fife, KY 16 9ST, GB.
2. Research Manager—Solid State NMR Department of Chemistry St. Andrews Centre for Advanced Materials University of St. Andrews Purdie Building, St. Andrews, Fife, KY16 9ST, GB.
3. Department of Chemistry, Materials and Forensic Science, University of Technology, Sydney, PO Box 123, Broadway NSW 2007 AU.