1. Department of Chemistry; Allama Iqbal Open University; Islamabad Pakistan
2. Faculty of Chemistry; Wrocław University of Technology; Wybrzeże Wyspiańskiego 27 50-370 Wrocław Poland
3. Bacha Khan University; Charsadda KPK Pakistan
4. National Center for Nanotechnology, Department of Metallurgy and Materials Engineering; Pakistan Institute of Engineering and Applied Sciences (PIEAS); Nilore 45650 Islamabad Pakistan
5. Anorganische und Analytische Chemie, Fakultät für Naturwissenschaften; Universität Paderborn; Warburgerstrasse 100 D-33098 Paderborn Germany