1. Department of Chemistry, United Arab Emirates University, Al-Ain, United Arab Emirates
2. Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
3. Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
4. Department of Chemistry, Faculty of Science, Cairo University, Gamma Street, Giza, 12613, Egypt