1. MTA-ELTE Complex Chemical Systems Research Group, H-1518 Budapest 112, P.O. Box 32; Hungary
2. Laboratory of Molecular Structure and Dynamics; Institute of Chemistry, Eötvös Loránd University, H-1117 Budapest, Pázmány Péter sétány 1/A; Hungary
3. Department of Physical Chemistry and Materials Science; University of Szeged, H-6720 Szeged, Rerrich B. tér 1; Hungary
4. Department of Applied and Environmental Chemistry; University of Szeged, H-6720 Szeged, Rerrich B. tér 1; Hungary