1. Department of Chemistry, Jahangirnagar University, Dhaka-1342, Bangladesh
2. Department of Chemistry, York University, 4700 Keele Street, Toronto, Canada
3. Institut
für Anorganische Chemie und Strukturchemie, Universität Düsseldorf, Universitätsstr. 1, D-40225 Düsseldorf, Germany
4. Department of Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy