1. Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
2. Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
3. Department of Chemistry, Faculty of Science and Mathematics, Universitas Diponegoro, Semarang, Indonesia
4. Indonesia Natural Dye Institute (INDI), Universitas Gadjah Mada, Yogyakarta, Indonesia