1. Department of Chemistry, Indian Institute of Engineering Science and Technology (IIEST), Shibpur P.O. – Botanic Garden, Howrah-711 103, WB, India
2. Department of Chemistry, St. Xavier's College (Autonomous), Palayamkottai, Tamil Nadu-627 002, India
3. Institute of Inorganic Chemistry, Universitat Stuttgart, Pfaffenwaldring 55, D-, 70569, Stuttgart, Germany