1. Department of Chemistry, St Stephen's College, Affiliated to the University of Delhi, Delhi – 110007, India
2. MolMod-CS - Instituto de Química, Universidade Federal Fluminense, Campos Valonginho s/n, Centro, Niterói 24020-14, Rio de Janeiro, Brazil
3. Department of Chemistry, Madras Christian College (Autonomous), Affiliated to the University of Madras, Chennai – 600 059, Tamil Nadu, India