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Abstract: The present communication deals with the synthesis of luminescent Mn-doped ZnS quantum dots (QDs) anchored to surface imprinted polymer for the optical sensing of 3-phenoxy benzoic acid (3-PBA) in urine samples. The combination of sensing and surface functionalization not only improves the selectivity of the method, but also increases the optosensing ability of the material for non-phosphorescent substances. The developed material was utilized for the selective and sensitive detection of 3-PBA in urine samples. The proposed method shows good linearity with a regression coefficient (R2) of 0.98. The limit of detection was found to be 0.117 μM. The method has an acceptable precision and accuracy which are found to be less than 8% and 80GÇô90% respectively at three different concentrations. The quenching constant of quantum dot-molecular imprinted polymer was found to be 3.4 times higher to that of the quantum dot-non imprinted polymer (QD-NIP) as calculated by Stern-Volmer equation. The sensing method developed has shown immense utility to detect 3-PBA in complex biological samples like urine
Template and target information: 3-phenoxybenzoic acid, 3-PBA
Author keywords: Optosensing quantum dots, Surface imprinted polymer, 3-Phenoxybenzoic acid, molecularly imprinted polymer, Manganese-doped zinc sulfide