1. Department of Chemistry; Periyar University; Salem Tamilnadu 636011 India
2. Department of Chemistry, Bangalore College of Engineering and Technology; Chandapura; Bangalore 560081 India
3. Department of Chemistry; C. Abdul Hakeem College of Engineering and Technology; Melvisharam Tamilnadu 632509 India
4. Research and Development Centre; Bharathiar University; Coimbatore 641046 India
5. PG and Research Department of Chemistry; Muthurangam Government Arts College; Vellore Tamilnadu 632002 India