1. Department of Chemistry, Sree Neelakanta Government Sanskrit College Pattambi, Palakkad-679306, Kerala, India
2. Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, UKM Bangi 43600, Selangore, Malaysia
3. Department of Applied Chemistry, Cochin University of Science and Technology, Cochin 22, Kerala, India