1. Department of Chemistry and Biochemistry, University of Southern Mississippi, Hattiesburg, Mississippi 39406, Laboratoire d'Analyse Numérique, Université Lyon I, Batiment 101, 43, bd du 11 Novembre 1918, 69622 Villeurbanne Cedex, France, and Faculty of Science and Technology, King Hassan II University−Mohammadia, B.P. 146, Mohammadia, Morocco