1 Department of Chemistry and Biochemistry, Queens College, City University of New York, 65-30 Kissena Boulevard, Queens, New York 11367, USA and PhD Programs in Chemistry and Physics, and Initiative for the Theoretical Sciences, Graduate Center, City University of New York, 365 Fifth Avenue, New York, New York 10016, USA.
2 Institute of Physical and Theoretical Chemistry, Goethe University Frankfurt, Frankfurt, Germany.
3 Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan and Physics Division, National Center for Theoretical Sciences, Taipei 106, Taiwan.
4 Department of Chemistry, University of California, Riverside, Riverside, California 92521, USA.