1. Catalysis and Nanomaterials Research Laboratory, Department of Chemistry, Loyola College, Chennai-600034, Tamil Nadu, India
2. Department of Physics, Dr. Mahalingam College of Engineering and Technology, Pollachi, Tamil Nadu-642 003, India
3. Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh, 11451, Saudi Arabia
4. INFN-Laboratori Nazionali di Frascati, Frascati, Italy