1. Wigner
Research Centre for Physics, Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest, Hungary
2. Department
of Chemistry, Technical University of Denmark, DK-2800 Kongens
Lyngby, Denmark
3. Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, P.O. Box 286, H-1519 Budapest, Hungary
4. School
of Chemistry, Newcastle University, Newcastle upon Tyne NE1
7RU, United Kingdom