1. Department of Chemistry, Sardar Vallabhbhai National Institute of Technology (SVNIT), Surat 395007, Gujarat, India
2. Department of Chemistry, Wichita State University (WSU), Wichita, Kansas 67260-0051, USA
3. Solid State Physics Division, Bhabha Atomic Research Centre (BARC), Mumbai 400 085, Maharashtra, India
4. Department of Chemistry, Veer Narmad South Gujarat University (VNSGU), Udhana-Magdalla road, Surat 395007, Gujarat, India