1. Computational and Bio-Simulation Research Group, University of Calabar, Calabar, P.M.B1115, Nigeria
2. Department of Pure and Applied Chemistry, University of Calabar, Calabar, P.M.B1115, Nigeria
3. Department of Physics, Lehigh University, Bethlehem, Pennsylvania18015, United States
4. Department of Chemistry, Tshwane University of Technology, Pretoria0183, South Africa