1. Department of Chemistry Thiagarajar College Madurai 625009 . Tamilnadu India
2. Department of Physics Sethu Institute of Technology Virudhunagar 626115 . Tamilnadu India
3. CSIR-North East Institute of Science & Technology Branch Laboratory Lamphelpat Imphal Manipur 795004 India
4. Department of Chemistry Kamaraj College Thoothukudi 628003 Tamilnadu India