1. Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
2. Department of Chemistry, College of Science, Ibb University, Ibb, Yemen
3. Department of Chemistry, St. Berchmans College (Autonomous), Changanassery, Kerala, India
4. Department of Physics, Dr Lankapalli Bullayya College, Visakhapatnam, Andhra Pradesh, India
5. Department of Physics, Mrs A.V.N.College, Visakhapatnam, Andhra Pradesh, India
6. Department of Chemistry, Kandaswami Kandar's College, Namakkal, Tamil Nadu, India