1. Department of Biology Chemistry and Environmental Sciences American University of Sharjah 26666 Sharjah United Arab Emirates
2. Sharjah Institute for Medical research University of Sharjah P.O. Box 27272 Sharjah United Arab Emirates
3. College of Science Department of Chemistry University of Sharjah 27272 Sharjah United Arab Emirates
4. College of Pharmacy University of Sharjah P.O. Box 27272 Sharjah United Arab Emirates
5. Department of Chemistry Temple University 201 Beury Hall 19122 Philadelphia PA USA