1. Department of Chemistry; CMS - Centre for Molecular Simulation, IQST- Institute for Quantum Science and Technology and Quantum Alberta, University of Calgary, 2500 University Drive N.W.; Calgary AB Canada T2N 1N4
2. Departamento de Física Aplicada; Centro de Investigación y de Estudios Avanzados, Unidad Mérida. Km 6 Antigua Carretera a Progreso. Apdo. Postal 73, Cordemex; 97310 Mérida Yuc. Mexico
3. College of Chemistry and Chemical Engineering; Henan University of Technology, No.100, Lian Hua Street, High-Tech Development Zone; Zhengzhou 450001 People's Republic of China