1. Department of Science and Humanities, Faculty of Engineering, Karpagam Academy of Higher Education (Deemed to be University), Coimbatore-641021, India
2. Department of Science and Humanities, Sri Eshwar College of Engineering, Coimbatore-641202, India
3. Department of Chemistry, Erode Sengunthar Engineering College, Erode-638057, India
4. Department of Chemistry, Jansons Institute of Technology, Coimbatore-641659, India