1. Fluorescence Spectroscopy Research Laboratory Department of Chemistry Shivaji University Kolhapur, MS 416004 India
2. Department of Chemistry The New College Kolhapur, MS 416012 India
3. Department of Chemistry P. E. S.'s Ravi S. Naik College of Arts and Science Farmagudi Ponda, Goa 403401 India
4. Department of Chemistry and Research Institute for Convergence of Basic Science Hanyang University, Seoul Campus Seoul 04763 South Korea
5. Department of Chemistry Shivaji University Kolhapur. MS 416004 India