Abstract
In this article, we developed a novel fluorescent probe for Pd2+ detection with the use of conjugated polymer poly(o-phenylenediamine) (PoPD) nanospheres as an effective sensing platform. The PoPD nanospheres were easily prepared via chemical polymerization of o-phenylenediamine (oPD) monomers by ammonium persulfate (APS) at room temperature. The general concept used in this approach lies in the fact that palladium react easily with a number of nitrogen-containing organic compounds, resulting in the formation of complexes in which nitrogen atoms are coordinatively bonded to palladium ions. The calibration graph was linear in the range of 0–240ppm for Pd2+, and the detection limit was as sensitive as 1ppm. The performances of the probe indicated that it could meet the selectivity requirements for biomedical and environmental application and also was sensitive enough to detect Pd2+ in environmental and biological samples.
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