1. Department
of Chemistry, UGC Sponsored Center for Advanced Studies-1, Guru Nanak Dev University, Amritsar-143005, Punjab India
2. Nanotechnology
Research Laboratory, College of North Atlantic, Labrador City, Newfoundland A2V 2K7 Canada
3. Department
of Chemistry and Biochemistry, Wilfrid Laurier University, Science Building,
75 University Avenue West, Waterloo Ontario N2L 3C5, Canada