Sulfonamide functionalized silica nano-composite: characterization and fluorescence “turn-on” detection of Fe3+ ions in aqueous samples

Photochemical & Photobiological Sciences Pub Date: 2023-04-25 DOI: 10.1007/s43630-023-00421-5

Abstract
We have synthesized novel sulfonamide-based nano-composite (SAN) for selective and sensitive detection of Fe3+ ions in aqueous samples. Morphological characterization of SAN was carried out with TGA, FT-IR, UV–Vis, ninhydrin assay, FE-SEM, pXRD, BET, EDX, and elemental analysis. The sensing nature, effect of pH, sensor concentration and response time analysis were accomplished with the help of emission spectral studies and SAN was assessed as “turn-on” emission detector for the biologically important Fe3+ ions. Here, the LOD and LOQ were computed to be 26.68?nM and 88.93?nM, respectively, and it was found to be much lower than the permissible limit of Fe3+ ions in drinking water. The accuracy of the sensor (SAN) was determined by testing the aqueous samples spiked with known concentrations of Fe3+ ions and results demonstrated 98.00–99.66% recovery, which made SAN a reliable, selective and sensitive chemosensor for the quantification of Fe3+ ions in fully aqueous media.Graphical abstract
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