1. Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409, USA
2. Department of Chemistry, Kyoto University, Kyoto, Japan
3. Departamento de Física, Universidade Federal do Espírito Santo, Vitória 29075-910, Espírito Santo, Brazil
4. Departamento de Química, Instituto Tecnológico de Aeronáutica, São José dos Campos, 12.228-900 São Paulo, Brazil
5. School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
6. Institute for Theoretical Chemistry, University of Vienna, Währingerstrasse 17, A-1090 Vienna, Austria