Colorimetric recognition of 6-benzylaminopurine in environmental samples by using thioglycolic acid functionalized silver nanoparticles

Schematic presentation of 6-benzylaminopurine (6-BAP) induces silver nanoparticles capped with thioglycolic acid (TGA-AgNPs) aggregation and triggers a visible color change. The TGA-AgNPs bind up with 6-BAP through hydrogen bonding and π-π bonding, resulting in the color change from yellow to reddish orange.130