1. Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan
2. Chemistry Department, Pamukkale University, Denizli 20017, Turkey
3. Department of Physics, Faculty of Science, King Khalid University, P. O. Box 9004, Abha, Saudi Arabia
4. Centre of Excellence in Solid State Physics, University of the Punjab, Lahore, 05422, Pakistan