1. Department of Chemistry, Dr. Ram Manohar Lohiya Avadh University, Ayodhya 224 001, India
2. Department of Chemistry, Faculty of Science, University of Lucknow, Lucknow 226 007, India
3. Materials and Chemical Characterisation Facility (MC2), University of Bath, Claverton Down, Bath, BA2 7AY, UK
4. Department of Chemistry, University of Bath, Calverton Down, Bath, BA2 7AY, UK
5. Department of Chemistry, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia