Visible and near-infrared sensing of fluoride by indole conjugated urea/thiourea ligands

Abstract

Two thiourea and urea based indole conjugated ligands show selective color changes with fluoride along with an absorbance band at 936 nm and 904 nm respectively.

Incorporation of the fluoride induced SiO bond cleavage and functionalized gold nanoparticle aggregation into one colorimetric probe for highly specific and sensitive detection of fluoride

“…It is well-known that pyridine group is an effective hydrogen bonding donor, which is often used in chemosensors for anions detection [38][39][40][41][42]. In addition, F − induced Si O bond cleavage reaction had also been well documented in the chemosensors to selectively target F − due to the highly special affinity between fluorine and silicon [43][44][45].…”

Fluorogenic and chromogenic detection of biologically important fluoride anion with schiff-bases containing 4-amino-1,8-naphthalimide unit

“…Among them, colorimetric and fluorescent sensors are especially attractive, since they allow the so called "naked-eye" detection, and they are qualified with fast response, high selectivity as well as inexpensive installations [6,7]. Especially, the probes possessing optical signals in NIR region are of great interest owing to its merit of avoiding interference from endogenous chromophores in biological system [8][9][10].…”

Zn(II) and Hg(II) complexes of naphthalene based thiosemicarbazone: Structure and spectroscopic studies

“…The structural diversity of thiosemicarbazide-based compounds is considerably increased not only due to the condensation of the different carbonyls but also due to the alkylation of the different parts of the thiosemicarbazide moiety [4]. More recently thiosemicarbazones are using for anion sensing purpose [5,6].…”