Synthesis of gold nanoparticles stabilized by a pyrazinium thioacetate ligand: A new colorimetric nanosensor for detection of heavy metal Pd(II)

[Display omitted] •1-(3-(acetylthio)propyl)pyrazin-1-ium ligand (APP) is synthesized, and used to stabilize AuNPs.•A sensitive colorimetric sensor for the selective detection of Pd(II) is developed.•Pd(II) caused significant decrease in SPR band of APP-AuNPs.•Pd(II) sensing protocol is robust and ra...

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