1. School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam, Kerala, 686560 India
2. Department of Chemistry, Government College, Nattakom P. O., Kottayam, Kerala, 686013 India
3. Institute for Integrated programs and Research in Basic Sciences (IIRBS), Mahatma Gandhi University, Priyadarsini Hills P. O., Kottayam, Kerala, 686560 India
4. Advanced Molecular Materials Research Center (AMMRC), Mahatma Gandhi University, Priyadarsini Hills P. O., Kottayam, Kerala, 686560 India