A novel near-infrared chemosensor for mercury ion detection based on D-A structure of triphenylamine and benzothiadiazole

Triphenylamine-based small-molecule fluorescent probes

“…A variety of metal ions, such as Cu 2+ , Al 3+ , Mg 2+ , Fe 3+ , and Zn 2+ , play important roles in living organisms, but excessive or insufficient amounts can cause a variety of diseases. 56–67 For instance, copper plays a vital role in various biological processes. However, Cu 2+ has a good redox property and can cause different health issues by accelerating the production of reactive oxygen species (ROSs).…”

“…12a). 79 This compound was synthesized by the strategy of extended π-conjugation between triphenylamine and benzothiadiazole. To investigate the selectivity, excess amounts of metal ion salts (2 equiv.)…”

A Comprehensive Review on Thiophene Based Chemosensors

“…In centered at 723 nm [28], only in the presence of the Hg 2+ without interference from other competing metal ions. The LOD was determined to be 0.36 µM for Hg 2+ ions.…”

“…UV-Vis absorbance spectra of probe 4 revealed that only Hg 2+ promoted a redshift from 489 nm to 535 nm, accompanied by red to violet color change. Probe 4 exhibited a drop in the fluorescent intensity band centered at 656 nm and an increase in the band centered at 723 nm [ 28 ], only in the presence of the Hg 2+ without interference from other competing metal ions. The LOD was determined to be 0.36 µM for Hg 2+ ions.…”

Carbon Dots: An Insight into Their Application in Heavy Metal Sensing

“…Fluorescence-based sensing has become an active area of interest in recent years due to its ability to easily recognize varied target molecules or ions using versatile sensory materials with high sensitivity and excellent linear response. Different organic and organic-inorganic materials have been employed as fluorescent sensors, including complexes [53,54], dyes [55,56], heterocyclic compounds [57,58], etc. Likewise, it has been demonstrated that the use of these organic sensors improves the catalytic activity for detecting the target metals [59].…”