1. Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
2. Department
of Chemistry, Tafila Technical University, P.O. Box 179, 66110 Tafila, Jordan
3. Department
of Chemistry, University College in Al-Qunfudah, Umm Al-Qura University, 1109 Makkah Al-Mukarramah, Saudi Arabia
4. Institute
of Inorganic and Analytical Chemistry, Goethe-University, D-60438 Frankfurt, Germany