A novel urea-linked dipodal naphthalene-based fluorescent sensor for Hg(II) and its application in live cell imaging

A highly selective and sensitive fluorescent sensor for the rapid detection of Hg2+ based on phenylamine-oligothiophene derivative

“…Among the various assays that are available for the detection of cations, the techniques based on fluorescence sensors present a number of appealing advantages in terms of high sensitivity and selectivity, low cost, facile operation, response time, local observation and the wide spread availability of equipment for analysis [5][6][7]. A great number of scientific endeavors have focused on the development of fluorescent chemosensors for Hg 2+ such as small molecules [8][9][10][11][12][13][14][15][16][17], conjugated polymers [18,19], nanoparticles [20][21][22][23], and biomolecules [24][25][26]. However, some of them still suffer from practical use, including crosssensitivities toward other metal ions, narrow pH span, delayed response and so on.…”

Highly sensitive and selective determination of Hg2+ by using 3-((2-(1H-benzo[d]imidazol-2-yl)phenylimino)methyl)benzene-1,2-diol as fluorescent chemosensor and its application in real water sample

“…In contrast, the addition of Hg 2þ resulted in significant quenching of the emission intensity at 430 nm, thus receptor 1 selectively recognised Hg 2þ ion. The fluorescence quenching after the addition of Hg 2þ ion is due to charge transition from receptor 1 to Hg 2þ (ligand to metal charge transition) followed by 'heavy-atom effect' (23). The selectivity of receptor 1 for various metal ions was shown in Figure S4.…”

A carbonothioate‐based highly selective fluorescent probe with a large Stokes shift for detection of Hg2+

“…Among these methods, optical probes might be the most attractive method due to their high selectivity, sensitivity, quick response and relatively low‐cost . Despite reports on Hg 2+ detection, some shortcomings still existed, such as longer response time, bad water solubility, a smaller Stokes shift, and poor selectivity (Table ) . Especially, the small Stokes shift of the probe will pose potential difficulties for quantitative determination and bioimaging, and reabsorption of emitted photons leads to undesired background interferences .…”