1. Discipline of Chemistry; Faculty of Teacher Training and Education; Tadulako University; Palu 94118 Indonesia
2. Australian Centre for Research on Separation Science; School of Chemistry; University of Tasmania; Hobart Tasmania 7001 Australia
3. Centre for Organic Electronics; Faculty of Science and Information Technology; University of Newcastle; Callaghan New South Wales 2308 Australia
4. Chemistry, School of Environmental and Life Sciences; University of Newcastle; Callaghan New South Wales 2308 Australia