1. Comenius University in Bratislava, Department of
Physical and Theoretical Chemistry, Faculty of Natural Sciences, 842 15 Bratislava, Slovakia
2. Molecular
Spectroscopy Laboratory, Departamento Química Física, University of the Basque Country UPV/EHU, P.O. Box 644, 48080 Bilbao, Spain
3. Institute
of Inorganic Chemistry, Slovak Academy of Sciences, 845 36 Bratislava, Slovakia