A pyrene based fluorescent turn-on chemosensor: aggregation-induced emission enhancement and application towards Fe3+ and Fe2+ recognition

Abstract

A pyrene-based probe bearing benzothiazole ionophore (Py-BTZ) was synthesised as a "turn-on" fluorescent chemosensor for the detection of Fe and Fe ions in CHCN : HO (1 : 1, v/v) solvent mixes. The chemosensor showed optical as well as colorimetric changes towards Fe and Fe ions along with a remarkable enhancement in fluorescence emission. The detection limit of Py-BTZ towards Fe and Fe ions was found to be 2.61 μM and 2.06 μM, respectively. The binding of Py-BTZ with Fe and Fe was determined by using FT-IR experiments. Interestingly, Py-BTZ shows aggregation induced emission enhancement (AIEE) properties in polar solvent mixes such as CHCN : HO (1 : 1, v/v).

A Highly Fluorescent Pyrene-based Sensor for Selective Detection of Fe3+ Ion in Aqueous Medium: DFT and Molecular Docking Studies

“…3a). By using the equation 3σ/K the limit of detection was found to be 1.81µM for the receptor PEBD which is less than the detection limits of previously reported chemosensors for Fe 3+ ion [27][28][29][30], which is given in Table S1 (supplementary data). According to a report by WHO, this is lower than the acceptable value of Fe 3+ in drinking water.…”

Aggregation-induced emission (AIE) from poly(1,4-dihydropyridine)s synthesized by Hantzsch polymerization and their specific detection of Fe2+ ions

“…Due to the need for specific detection in complex environments, fluorescent measurements are widely used in ion detection. [16][17][18][19] However, Fe 2+ ions are more reactive and harder to detect than Fe 3+ ions. At present, most common fluorescent probes for iron ions target Fe 3+ ions and are mainly based on small-molecule compounds.…”

Pyrrolo[3,4-c]pyridine-Based Fluorescent Chemosensor for Fe3+/Fe2+ Sensitivity and Their Application in Living HepG2 Cells

“…In this regard, various analytical methods and electrochemical methods have come up for critical detection of metal ions . However, time-consuming sample pretreatments, along with strenuous procedures and expensive equipment limit their extensive use . Thus, an alternative approach considering the low cost, high sensitivity, easy monitoring of target ions, and nondestructive in nature could prove effective.…”