1. Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
2. Faculty of Science and Technology, Universiti Sains Islam Malaysia, Nilai, Negeri Sembilan, Malaysia
3. UK National Crystallography Service, Department of Chemistry, University of Southampton, Southampton, UK
4. Center of Applied Science Studies, Universiti Teknologi MARA Sarawak, Kota Samarahan, Sarawak, Malaysia