1. Department of Chemistry, Mahila Maha Vidyalaya, Banaras Hindu University, Varanasi-221005, India
2. Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
3. X-ray Diffraction Laboratory, Department of Chemistry, Texas A & M University, USA
4. Department of Chemistry, Savitribai Phule Pune University, Pune 411007, India
5. LCC-CNRS, Université de Toulouse, CNRS, Toulouse, France