1. Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt;
2. Chemistry Department, Faculty of Science, Suez University, Suez, Egypt;
3. Pharmaceutical Science Department, Pharmacy College, Shaqra University, Saudi Arabia;
4. Chemistry Department, Faculty of Science, Al-azhar University, Egypt;
5. Tanning Materials and Leather Technology Department, National Research Centre, Cairo, Egypt;
6. Photochemistry Department, National Research Centre, Cairo, Egypt