1. Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia;
2. Centre for Foundation Studies in Science, University of Malaya, Kuala Lumpur 50603, Malaysia;
3. School of Chemical Sciences, University of Science Malaysia, Penang 11800, Malaysia;
4. Institute of Energy Infrastructure, Universiti Tenaga Nasional, Kajang 43000, Malaysia;
5. Faculty of Pharmacy, Airlangga University, Jalan Dharmawangsa Dalam, Surabaya 60115, Indonesia;
6. Chemistry Department, Faculty of Science and Mathematics, University of Pendidikan Sultan Idris, Tg. Malim, Perak 35900, Malaysia;
7. Department of Chemistry, Faculty of Science and Mathematics, University of Indonesia, Depok 16424, Indonesia