1. Department of Chemistry, St Joseph’s College (Autonomous), Devagiri, Calicut, Kerala, India
2. Department of Chemistry, N. S. S. College Manjeri, Malappuram, Kerala, India
3. J. J. Murphy Research Centre, Rubber Park India (P) Limited, Ernakulam, Kerala, India
4. Deanship of Scientific Research & Basic and Applied Sciences Research Centre, Imam Abdulrahman Bin Faisal University, Saudi Arabia