1. Institute for Integrated Programmes and Research in Basic Sciences (IIRBS) Mahatma Gandhi University Priyadarsini Hills P.O, Kottayam, Kerala 686560 India
2. Postgraduate Department of Chemistry Sree Narayana College Sivagiri, Sreenivasapuram P O, Varkala, Thiruvananthapuram, Kerala 695145 India
3. School of Chemical Sciences Mahatma Gandhi University PD Hills, Kottayam, Kerala 686560 India