1. Department of Chemistry; University of Calgary; Calgary Alberta T2N 1N4 Canada
2. Department of Chemistry and Biochemistry and The Canadian Centre for Research in Advanced Fluorine Technologies; University of Lethbridge; Lethbridge Alberta T1K 3M4 Canada
3. Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Freiburg Germany