1 Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
2 Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802, USA.
3 Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom.
4 Department of Chemistry, Stanford University, Stanford, California 94305, USA.
5 Thomas Young Centre and London Centre for Nanotechnology, 17-19 Gordon Street, London WC1H 0AH, United Kingdom and Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
6 Department of Chemistry, Columbia University, New York, New York 10027, USA.
7 Center for Computational Molecular Science and Technology, School of Chemistry and Biochemistry, School of Computational Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA.
8 Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China; and Physical Science Laboratory, Huairou National Comprehensive Science Center, Beijing 101407, China.
9 Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, USA.
10 Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain.
11 Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA.
12 AIP Publishing, Melville, New York 11747, USA.
13 Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA.