1. Centre for Research in Molecular Modeling, Department of Chemistry and Biochemistry, Concordia University, Montréal, Québec, Canada, H3G 1M8, Institute of Polymers, Department of Materials, ETH Zurich, HCI G 527, 8093 Zurich, Switzerland, Theoretical Physics, Faculty of Science, University of Paderborn, 33098 Paderborn, Germany, and Computational Centre for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217