1. 1Srinivasan College of Arts and Science (Affiliated to Bharathidasan University), Perambalur District, Tamil Nadu, South India.
2. 2Department of chemistry, Bishop Heber College (Affiliated to Bharathidasan University), Tiruchirappalli District, Tamil Nadu, South India.
3. 3St. Joseph’s Institute of Technology (Affiliated to Anna University), Chennai, Tamilnadu, South India.