1. Department of Chemistry , Rishi Bankim Chandra Evening College , Naihati , 24-Parganas (N), Pin-743165 , India
2. Department of Chemistry , Rishi Bankim Chandra College for Women , Naihati , 24-Parganas (N), Pin-743165 , India
3. Department of Chemistry , R K Mission Residential College , Narendrapur , Kolkata 700103 , India
4. Bose Institute , P 1/12 CIT Scheme VII M , Kolkata 700054 , India