Functionalized polyacetylenes with strong luminescence: turn-on fluorescent detection of cyanide based on the dissolution of gold nanoparticles and its application in real samples

By dissolution of Au NPs, new polyacetylene-functionalized Au NPs were successfully developed as turn-on fluorescent probes for the detection of cyanide sensitively and selectively. The lowest concentration to quantify cyanide ions could be down to 3.0 x 10 (6) M, and other common anions including AcO-, Br-, C2O42-, Cl-, CO32-, F-, HCO3-, NO2-, NO3-, PO43-, S2O82-, SCN-, SO32-, SO42-, HPO42-, and P2O74- had almost no influence. Furthermore, several real water samples spiked with cyanide, including local groundwater, tap water, boiled water, and lake water, were analyzed with RSD values less than 4%, and the experimental results demonstrated that our developed sensing system worked well in the above water samples.