Background: α-Mangostin was extracted with methanol from the rind of mangosteen fruit and purified by using
silica gel column chromatography technique. The compound is characterised using infrared, 13C and 1
H NMR as
well as UV–vis spectroscopy. The α-mangostin dispersion in colloidal systems was studied by incorporating it with
an ionic microgel, poly (N-Isopropylacrylamide)-co-2VP at different pH.
Result: The DLS result showed the size of microgel-α-mangostin mixture declined from 548 nm to 200 nm upon
the increment of the pH. Moreover, it was found the morphology of loaded compound depended largely on the
nature of the continuous phase of the microgel system. Interestingly, by manipulating the pH, α-mangostin tends
to form crystal at extremely low pH and transforms into spherical shapes at pH 6.
Conclusion: This research shows different structures of the α-mangostin particle that are attributed by adjusting
the pH using microgel systems as a template.