1. School of Chemistry and Physics, University of KwaZulu Natal, Durban, South Africa
2. Department of chemical sciences, I. K. Gujral Punjab Technical University Kapurthala, Kapurthala, India
3. Department of Biochemistry, Central University of Punjab, Bathinda, India
4. Department of Chemistry, Dr B R Ambedkar National Institute of Technology, Jalandhar, India