Benzothiazole-based fluorescence chemosensors for rapid recognition and “turn-off” fluorescence detection of Fe3+ ions in aqueous solution and in living cells

Thermosensitive Fluorescent Microgels for Selective and Sensitive Detection of Fe3+ and Mn2+ in Aqueous Solutions

“…Regarding Fe 3+ and Mn 2+ ions, the long-term exposure to excessive levels of these heavy metal ions could cause numerous discomforts and diseases, such as vomiting, convulsions, Alzheimer’s disease, carcinoma, and even death, although Fe 3+ and Mn 2+ ions play vital roles in a series of critical biotic processes, including intracellular metabolism, DNA synthesis, enzymatic transformation, and the balance of catalytic cycle. Several fluorescent sensors have been constructed for detecting Fe 3+ ions in aqueous solutions. − For example, Li et al reported the dendrimer PYTPAG2 as a fluorescently quenched sensor for the detection of Fe 3+ ions in solution. The PYTPAG2 is composed of the interior core of pyrene and the exterior periphery of triphenylamine, which processes stable sensitivity and selectivity toward Fe 3+ ions in solution with a detection limit ( D L ) of 5.0 × 10 –7 M. Ma et al prepared monodispersed fluorescent MoS 2 quantum dots (QDs) for Fe 3+ detection with a D L of 1 μM in the concentration range 0–50 μM.…”

A novel selective fluorescent chemosensor for Fe3+ ions based on phthalonitrile dimer: synthesis, analysis, and theoretical studies

“…As shown in Table 1, phthalonitrile compound (3) was found able to determine different concentrations of spiked Fe 3+ with good recovery, indicating that phthalonitrile compound (3) can potentially be employed for detecting Fe 3+ in real samples. In addition, analytical parameters of phthalonitrile compound (3) for Fe 3+ determination were compared with some other Fe 3+ -selective fluorescent sensor studies [26][27][28][29][30]. As seen in Table 2, the phthalonitrile compound (3) showed lower LOD and larger linear range than the given fluorescent sensors studied in the literature.…”

Tunable fluorescent amino-functionalized Ti3C2Tx MXene quantum dots for ultrasensitive Fe3+ ion sensing

“…5,6 Thus, accurate sensing of Fe 3+ plays an important role in assessing the health status of animals and plants as well as in promoting efficient industrial production, and the development of superior nanoprobes for Fe 3+ detection in biological and environmental applications has attracted a great deal of research interest. 7,8 The fluorescence method for Fe 3+ detection possesses the advantages of faster response, smaller sample amounts, and excellent sensitivity, selectivity and reproducibility compared to other methods such as colorimetry, electrochemistry, ultraviolet-visible spectrometry (UV-Vis) and inductively coupled plasma mass spectrometry (ICP-MS). [9][10][11][12] Among the developed Fe 3+ fluorescence detectors, such as semiconductor quantum dots (QDs), graphene QDs, carbon QDs, naturally fluorescent proteins and organic molecules, MXene QDs (MQDs) have recently emerged as novel fluorescence probes because of their good liquid dispersibility, photostability, biocompatibility and ease of surface functionalization.…”