synthesis of reduced form of nanopolyaniline in a new method and its functionalization with chitosan for silver ion fluorescence measurement

In this work, we introduce a new and easy method for the synthesis of fluorescent nano probe. the nano probe was synthesized directly using aniline and thioglycolic acid. the formation of nanoparticles was characterized by particle size analysis and tem images. reduced form polyaniline (leucoemeraldin) is proposed for the nanoparticles name as the result of fourier transform infrared (ftir), x-ray diffraction (xrd), nuclear magnetic resonance (nmr) fluorescence, and ultraviolet-visible (uv-vis) spectroscopy studies. to make modifying the le nanofiber, chitosan solution was severed as stabilizing and modifying agent accordingly the 0.6 -8 nm-sized nano sphere were gained, which exhibited enhanced fluorescence intensity. cs-le nanosphere emitted bright blue fluorescence in 342 nm with excitation at 280 nm. cs-le exhibited an exceptional fluorescence sensor for the application of silver ion (ag+) sensing. experimental results showed that the decrease of the fl was proportional to the concentration of silver ion within the range of 6.4-159 ng ml-1 (r2 = 0.9953) with a detection limit of 1.7 ng ml-1 under the optimized experimental conditions. furthermore, the proposed method applies to the detection of ag+ in real aqueous samples, which is a detection system with excellent development prospects.