1. Department of Chemistry, Faculty of Science, University of Lucknow, Lucknow 226 007, India
2. Materials and Chemical Characterisation Facility (MC2), University of Bath, Claverton Down, Bath, BA2 7AY, UK
3. Department of Physics, Savitribai Phule Pune University, Pune-411007, India
4. Department of Environmental Science, Savitribai Phule Pune University, Pune-411007, India
5. Department of Chemistry, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia