1. School
of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster
Road, Edinburgh EH9 3FJ, U.K.
2. International
Centre for Quantum and Molecular Structures, College of Sciences, Shanghai University, 99 Shangda Road, Shanghai 200444, China
3. Department
of Chemistry, Washington State University, Pullman Washington 99164-4630, United States
4. Bruker UK, Banner Lane, Coventry CV4 9GH, U.K.