1. University of Kerala, Bishop Moore College; Department of Chemistry, Kallumala; Mavelikara Kerala 690110 India
2. Mahatma Gandhi University, CMS College; Department of Chemistry; CMS College Road Kottayam Kerala 686001 India
3. Mahatma Gandhi University; International and Inter University Centre for Nanoscience and Nanotechnology; Priyadarshini Hills P. O. Kottayam Kerala 686560 India
4. Mahatma Gandhi University; School of Chemical Sciences; Priyadarshini Hills P. O. Kottayam Kerala 686560 India