1. Institute of Inorganic and Analytical Chemistry Friedrich Schiller University Jena 07743 Jena Germany
2. Department of Molecular Biology and Biochemistry University of California, Irvine Irvine CA 92697-3900 United States
3. Present address: Institute of Industrial Control Systems and Computing Universitat Politècnica de València Camino de Vera, s/n. 46022 Valencia Spain
4. Institute of Physical Chemistry University of Stuttgart 70569 Stuttgart Germany
5. Department of Chemistry Ludwig Maximilians University Munich 81377 Munich Germany
6. Department of Chemistry University of California, Irvine Irvine CA 92697-2025 United States