1. Department of Chemistry, University of California Davis, One Shields Ave.. Davis, California 95616, United States
2. Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
3. Quantum Simulations Group, Materials Science Division, Lawrence Livermore National Laboratory, Livermore, California 94550-5507, United States
4. Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
5. Materials Science Division and Center for Molecular Engineering, Argonne National Laboratory, Lemont, Illinois 60439, United States