1. Department of Chemistry and Biotechnology; BioCenter; SLU; Box 7015 75007 Uppsala Sweden
2. Department of Organic Chemistry; Biochemistry and Catalysis (B.C. and V.I.P.); Department of Physical Chemistry (B.J.); University of Bucharest; B-dul Regina Elisabeta, nr. 4-12, Sector 3 030018 Bucharest Romania
3. National Institute for Laser; Plasma and Radiation Physics; P.O. Box MG-36 RO 76900 Bucharest-Magurele Romania
4. Institut de Chimie de Clermont-Ferrand - UMR CNRS; 6296 Sigma-Clermont Clermont-Ferrand, Cedex, France