Curcumin associated poly(allylamine hydrochloride) crosslinks with dipotassium phosphate and silica nanoparticles to form nanocapsule that shows DPPH scavenging activity and releases curcumin triggered by pH.

Curcumin associated poly(allylamine hydrochloride) cross-links with dipotassium phosphate and subsequently is assembled with $24 nm SiO 2 nanoparticles to form hierarchically ordered nanocapsule structures, which are 100-1000 nm in size depending on the concentration of dipotassium phosphate. These structures reverse the excited state intra-molecular hydrogen transfer in curcumin depending on the size of the nanocapsules.

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