1. Lehrstuhl
für Theoretische Chemie, Universität Erlangen-Nürnberg, Egerlandstrasse 3, D-91058 Erlangen, Germany
2. Computational
Chemistry, University of Potsdam, D-14476 Potsdam, Germany
3. Materials
Science and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213-3890, United States