Fe(III) conjugated fluorescent organic nanoparticles for ratiometric detection of tyramine in aqueous medium: a novel method to determine food quality

Abstract

A tetrapodal receptor was synthesized and was processed into fluorescent organic nanoparticles (FONs) for determination of important analytes in aqueous medium. The receptor was fully characterized using characterization techniques. Recognition behavior of FONs towards different metal ions was investigated with fluorescence spectroscopy, amongst them Fe3+ ions showed quenching behavior in the emission spectra. The Fe3+ ion complex of FONs based sensor was further tested with different biogenic amines and ratiometric response was obtained for tyramine. Fluorescence emission profile of FONs. Fe3+ ion complex showed no change in the pH in wide range; thereby increasing their utility in biological and environmental samples. Tyramine detection was linearly proportional in response with the detection limit of 377 nM.