1. Department of Chemistry, Faculty of Science, Ain Shams University, Cairo 11566, Egypt
2. Department of Chemistry, College of Science, University of Bahrain, Zallaq P.O.
Box 32038, Bahrain
3. Department of Chemistry, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
4. Central Laboratory, Faculty of Science, Ain Shams University, Cairo 11566, Egypt