1. Department of Chemistry, Kohat University of Science and Technology, Kohat-26000 , Khyber Pakhtunkhwa , Pakistan
2. Institute of Chemical Sciences, University of Swat , Swat-19200 , Khyber Pakhtunkhwa , Pakistan
3. Chemistry Department and Center of Excellence for Advanced Materials Research, King Abdulaziz University , P.O. Box 80203 , Jeddah 21589 , Saudi Arabia