1. Department of Molecular Science and Technology; Ajou University; Suwon 443-749 Korea
2. Department of Physics; Korea Advanced Institute of Science and Technology (KAIST); Daejeon 34141 Korea
3. Institute of Computational Physics; Zurich University of Applied Sciences (ZHAW); 8401 Winterthur Switzerland
4. Department of Chemistry & Department of Energy Systems Research; Ajou University; Suwon 443-749 Korea
5. Department of Chemistry; Kyonggi University; San 94-6, Iui-dong, Yeongtong-gu, Suwonsi Gyeonggi 443-760 Korea