1. Department of Chemistry, BBK DAV College for Women, Amritsar 143005, Punjab, India
2. Department of Applied Chemistry, Guru Nanak Dev University, Amritsar 143005, Punjab, India
3. Nanotechnology Research Laboratory, College of North Atlantic, Labrador City, NL A2 V 2K7 Canada
4. Department of Chemistry, Mount Saint Vincent University, Halifax, Nova Scotia, B3M 2J6 Canada