1. Jacobs University Department of Life Sciences and Chemistry P. O. Box 750561 28725 Bremen Germany
2. Department of Chemistry Faculty of Sciences University of Balamand P. O. Box 100 Tripoli Lebanon
3. Université Paris‐Sud Laboratoire de Chimie‐Physique, UMR 8000 CNRS 91405 Orsay France
4. Department of Chemistry and Biochemistry Florida State University 32306 Tallahassee FL USA