1. ISIS, Université Louis Pasteur, 8, Allée Gaspard Monge, BP 70028, 67083 Strasbourg, France
2. Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60780 Poznań, Poland
3. Current address: Institut Charles Sadron 6 Rue Boussingault, 67083 Strasbourg, France
4. Department of Chemistry, University of Jyväskylä, P. O. Box 35, 40351, Jyväskylä, Finland