Triazole-Coupled Benzimidazole-Based Fluorescent Sensor for Silver, Bromide, and Chloride Ions in Aqueous Media

Ion recognition by 1,2,3‐triazole moieties synthesized via “click chemistry”

“…[ 240 ] Ko research group reported a benzimidazole‐based fluorescent sensor coupled with 1,2,3‐triazole moiety (Table 3b) that showed fluorescence quenching on increasing concentrations of Ag + . [ 241 ] In 2019, Singh research group presented the first report of silatrane‐based 1,2,3‐triazole sensor (Table 3b) for Ag + recognition that exhibited enhanced absorption on Ag + addition with low detection limit. [ 242 ] Liu research group, in 2011, reported two sensor probes for Ag + and Hg 2+ recognition—a binol‐pyrene‐derived 1,2,3‐triazole‐based probe (Table 3b) that showed amplified monomer emission and diminished excimer emission on Ag + addition whereas augmented monomer as well as excimer emission on Hg 2+ addition [ 243 ] and (S)‐binol‐based 1,2,3‐triazole derivative (Table 3b) that exhibited switch on and switch off fluorescence for Ag + and Hg 2+ , respectively.…”

“…[240] Ko research group reported a benzimidazole-based fluorescent sensor coupled with 1,2,3-triazole moiety (Table 3b) that showed fluorescence quenching on increasing concentrations of Ag + . [241] In 2019, Singh research group presented the first report of silatrane-based 1,2,3-triazole sensor (Table 3b) for Ag + recognition that exhibited enhanced absorption on Ag + addition with low detection limit. [242] Liu research group, in 2011, reported two sensor probes for Ag + and Hg 2+ recognition-a binol-pyrene-derived 1,2,3-triazole-based probe (Table 3b) that showed amplified monomer emission and diminished excimer emission on Ag + addition T A B L E 3 b 1,2,3-Triazole "click" ligands as selective 4d-metal ion(s) sensors with their respective initial and final absorption and/or emission maxima values, solvent system, limit of detection (LoD), and ligand to metal binding ratio, where the symbol representation is as follows: Note:…”

Ti3C2Tx MXene Nanosheet-Based Probe for Ion Fluorescence and Visual Detection of Ag+ in Aqueous Solution and Living Cells

“…A series of detection methods have been developed to detect silver ions, such as atomic absorption spectroscopy, inductively coupled plasma–mass spectroscopy, and ion-selective electrodes. , However, these methods mentioned above all require expensive equipment or complex technology. − On this basis, fluorescent probes have become a popular method due to their high sensitivity, rapidity, simple operation, common instruments, and suitability for biological systems. − In the past years, some fluorescent probes for detecting silver ions have been developed, but the following defects are still not solved. − First, some currently reported methods utilize the “silent ion” of silver ions to quench their fluorescence, which is not conducive to high signal output. , Second, the proposed probes only show moderate fluorescence changes, small response range to silver ion concentration, so the sensitivity of these probes is usually not enough to detect low concentrations of silver ions in water samples. , Finally, the probes reported in the literature are difficult to distinguish Ag + from other metal ions (such as Au 3+ ). , Therefore, it is an urgent need to develop a novel fluorescent probe with high sensitivity and selectivity in real samples. − …”

N, N’‐Disubstituted Benzimidazolium Salts: Synthesis, Characterization, Micromolar Detection of Fe(III) ions in Aqueous system, Biological Evaluation and Molecular Docking Studies

“…Benzimidazole is known as a fluorophore moiety and benzimidazole derivatives have been used as chemosensors for the detection of metal ions [25–32] . Moreover, some benzimidazolium salts are also known as probes for the recognition of various cations and anions in aqueous media.…”