1. Department of Chemistry, Himachal Pradesh University, Shimla, HP, India
2. Department of Chemistry, Government College, Ateli, Haryana, India
3. Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, B.C, México
4. Department of Pure of Applied Chemistry, Strathclyde University, Glasgow, UK
5. Department of Chemistry, Guru Nanak Dev University, Amritsar, Punjab, India