1. Department of Chemistry, University of North Texas, Denton, Texas 76201
2. MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou 510275
3. Department of Chemistry, Ibn Tofail University, ESCTM, 14000 Kenitra
4. Department of Chemistry, College of Science, King Saud University, Riyadh 11451