1. a Department of Chemistry, Alzaiem Alazhari University, Khartoum North 13311, Sudan
2. b Department of Chemistry, College of Science & Arts, King Abdul-Aziz University, Rabigh, Saudi Arabia
3. c Pure and Applied Chemistry Research Group, Department of Chemistry, College of Sciences, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates