1. Department of Chemistry, Sardar Vallabhbhai National Institute of Technology (SVNIT), Surat 395 007, Gujarat, India
2. Department of Chemical Engineering, Indian Institute of Technology (IIT), Gandhinagar 382 355, Gujarat, India
3. Department of Chemistry, Wichita State University (WSU), Wichita, Kansas 67260-0051, United States
4. Solid State Physics Division, Bhabha Atomic Research Centre (BARC), Mumbai 400 085, India
5. Department of Chemistry, Veer Narmad South Gujarat University (VNSGU), Udhana-Magdalla Road, Surat 395 007, Gujarat, India