1. Department of Studies and Research in Chemistry; Tumkur University; Tumkur- 572101 India
2. New Horizon College of Engineering, affiliated to VTU Belagavi; Kadubeesanahalli Bangalore 560103 India
3. Department of Chemistry; Siddaganga Institute of Technology, affiliated to VTU Belagavi; B.H. Road Tumkur- 572102 India
4. Raman Research Institute; C.V. Raman Avenue Bangalore- 560080 India