1. University of Jyvaskyla, Department of Chemistry, P.O. Box 35, Survontie 9B, 40014 Jyväskylä, Finland
2. Faculty of Engineering and Natural Sciences, Tampere University, P.O. BOX 541, FI-33101 Tampere, Finland
3. LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal