1. Department of Chemistry, University of Agriculture Faisalabad, Faisalabad 38000, Pakistan
2. Department of Physics, College of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
3. Centre for Ionic University of Malaya, Department of Physics, University of Malaya, Kuala Lumpur 50603, Malaysia
4. Department of Chemistry, COMSATS University, Abbottabad Campus, Islamabad 22060, Pakistan
5. Graduate School, Department of Chemistry, Chosun University, Gwangju 501-759, Republic of Korea
6. Department of Chemistry, Khwaja Fareed University of Engineering & Information Technology, Rahim Yar Khan 64200, Pakistan