Synthesis of novel benzothiazole based fluorescent and redox-active organic nanoparticles for their application as selective and sensitive recognition of Fe3+ ions

A novel benzothiazole based compound (1) has been synthesized and further employed for the fabrication of fluorescent as well as redox active organic nanoparticles (1-ONPs) by adopting a nano-re-precipitation method. The formation of 1-ONPs was confirmed by Dynamic Light Scattering (DLS) and Transmission Electron Microscopy (TEM) techniques, where the size was found to be similar to 42.84 nm in the optimized conditions. The resulting 1-ONPs acted as selective and sensitive sensor for recognition of Fe3+ ions in dual transduction mode. The nanoparticles underwent quenching of fluorescence intensity as well as an amplified stripping current response in the presence of Fe3+. The high surface charge density worked as a tool for enhancing the current response of nanoparticles over bulk solution mode and hence is extended to in-field analysis.

Automated summary

A novel benzothiazole-based compound was synthesized to fabricate fluorescent and redox active organic nanoparticles through nano re-precipitation method. The resulting nanoparticles, acting as a selective and sensitive sensor for Fe3+ ions in dual transduction mode, showed quenching of fluorescence intensity and an amplified stripping current response in the presence of Fe3+, making them suitable for in-field analysis.