1. Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
2. Thushara, Kollam, Kerala, India
3. Department of Chemistry, Mannaniya College of Arts and Science, Pangode, Kerala, India
4. Department of Physics, Kanchi Shri Krishna College of Arts and Science, Kanchipuram, Tamil Nadu, India