1. Department of Chemistry, Faculty of Science, Al-Balqa Applied University, PO Box 19117, Al-Salt, Jordan
2. Department of Chemistry, Faculty of Science, The University of Jordan, Amman 11942, Jordan
3. Department of Chemistry, The Hashemite University, PO Box 150459, Zarqa 13115, Jordan
4. WACKER-Lehrstuhl für Makromolekulare Chemie, Technische Universität München, Lichtenbergstraße 4, 85747 Garching bei München, Germany