1. H.E.J. Research Institute of Chemistry, ICCBS, University of Karachi, Karachi 75270, Pakistan
2. Department of Chemistry, NED University of Engineering and Technology, Karachi 75270, Pakistan
3. Department of Chemistry, Akwa Ibom State University, Ikot Akpaden Mkpat Enin L.G.A., Akwa Ibom State, P.M.B 1167, Uyo, Nigeria