1. Department
of Chemistry, Burdwan University, Golapbag, Burdwan, 713104 West Bengal, India
2. Government College of Engineering and Leather Technology, Salt Lake Sector-III, Kolkata 700098, India
3. Department
of Chemical and Pharmaceutical Sciences, Università degli Studi di Trieste, Via Licio Giorgieri 1, 34127 Trieste, Italy