A turn-on red-emitting fluorescent probe for determination of copper(II) ions in food samples and living zebrafish

The influence of gastrointestinal pH on speciation of copper in simulated digestive juice

“…The concentration of copper ions may be extremely low in the presence of organic matter, and high when the ligand is insufficient. However, trace amount of Cu 2+ has been detected in food samples, living zebrafish (Zhou et al., 2021 ), and AD rat brains (Yu et al., 2017 ) and significant toxicity was found. The toxicity of copper ions has been well established by a lot of articles.…”

Versatile sensing platform of an innovative copper oxide-assisted Cu-phenolic coordination nanosheet-mediated fluorophore-tagged GT-rich SSA-based fluorescence ON–OFF biosensor for the subsequent detection of Cd2+ and S2− ions

“…12,13 These factors have contributed to great attention devoted to fluorescent sensors in comparison with other sensing methods. [14][15][16][17][18][19][20][21] Metal-mediated base-paired DNA (in the form of aptamers or oligonucleotides) has long been scrutinized in basic scientific research and for the purposes of fluorescence biosensing applications. Oligonucleotides, having a strong interaction capability with specific metal ions, are well suited to the creation of a fluorometric biosensor due to the ease of tagging fluorophores at precise positions, binding-induced changes in oligonucleotide structures, hybridization of the oligonucleotides to complementary oligonucleotide sequences, changes in molecular volume upon the binding interaction of oligonucleotides with their target (metal ions or biomolecules), and adsorption of oligonucleotides onto quenching nanomaterials.…”

A rhodamine derivative probe for highly selective detection of Cu(II)

“…Compared with nanomaterials, organic chemical probes are of superior biocompatibility, flexible structural modification and relatively low toxicity. In addition, fluorescence bioimaging technology allows us to detect a variety of metal ions including Cu(II) in vivo at a subcellular level [22,23], thus they were receiving much more attention.…”