1. Department of Chemistry, Faculty of Education, Red Sea University, Port Sudan, Sudan
2. Department of Chemistry, College of Science, King Khalid University, Abha, Saudi Arabia
3. Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha, Saudi Arabia
4. Sudan Atomic Energy Commission, Khartoum, Sudan
5. Department of Physics, College of Science, King Khalid University, Abha, Saudi Arabia