Naphthoimidazolium based ratiometric fluorescent probes for F− and CN−, and anion-activated CO2 sensing

Advances in fluorescent and colorimetric sensors for anionic species

“…Imidazolium moieties have also been extensively used for anion recognition [41] and recently were applied by Yoon and co-workers for anion sensing using naphthoimidazolium derivative 18 (Fig. 11) [42]. Upon addition of various anion guests in acetonitrile, the formation of an CH + -anion H-bond caused an hypsochromic shift in the fluorescent maximum emission, from 465 nm to 375 nm, only in the case of fluoride and cyanide.…”

Sondas fluorescentes, una revisión general: propiedades, diseño y aplicaciones

“…Otra área de aplicación de las sondas fluorescentes se da en la detección de especies químicas potencialmente tóxicas relacionadas con la contaminación del medio ambiente. Por ejemplo, se puede hacer la detección selectiva de iones cianuro (CN -) y fluoruro (F-) y CO2 (Figura 10A) (Kwon, et al, 2019). Estas especies provocan cambios en los espectros de fluorescencia de la sonda, se genera un nuevo pico a 375 nm y disminuye el pico de fluorescencia original a 465 nm.…”

A Novel and Reactive Fluorescent “Turn‐on” Probe Based on Benzimidazole Derivative for Selective CN−Detection

“…Cyanide can be absorbed through the lungs, stomach, intestines and skin, resulting in vomiting, convulsions, confusion and ultimately death [10] . It causes sudden death by disrupting the electron transport system present in the mitochondria [11,12] . Cyanide salts containing cyanide are also widely used in plastics, metallurgical manufacturing, and mining of silver and gold, leading to environmental pollution, and cyanide is also a very important chemical reagent used in many chemical industrial processes, such as electroplating, jewelry making, X‐ray film recovery, tanning, and metallurgy [13–15] .…”