1. Department
of Chemistry, University of South Florida, 4202 East Fowler Avenue CHE205, Tampa, Florida 33620-5250, United States
2. Chemistry
Department, Faculty of Science, Alexandria University, P.O. Box 426, Ibrahimia, Alexandria 21321, Egypt
3. Department
of Chemical and Environmental Sciences, University of Limerick, Castletroy,
Co., Limerick, Ireland