1. Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
2. Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
3. Institute for Theoretical Chemistry, University of Vienna, Währingerstrasse 17, A-1090 Vienna, Austria
4. Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
5. Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470, Mülheim an der Ruhr, Germany