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Current Organic Synthesis

Author(s): Jeymy T. Sarmiento and Jaime Portilla*

DOI: 10.2174/1570179419666220218095741

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Current Advances in Diazoles-based Chemosensors for CN- and FDetection

Page: [77 - 95] Pages: 19

  • * (Excluding Mailing and Handling)

Abstract

Advances in molecular probes have recently intensified because they are valuable tools in studying species of interest for human health, the environment, and industry. Among these species, cyanide (CN-) and fluoride (F-) stand out as hazardous and toxic ions in trace amounts. Thus, there is a significant interest in probes design for their detection with diverse diazoles (pyrazole and imidazole) used for this purpose. These diazole derivatives are known as functional molecules because of their known synthetic versatility and applicability, as they exhibit essential photophysical properties with helpful recognition centers. This review provides an overview of the recent progress (2017-2021) in diazole-based sensors for CN- and F- detection, using the azolic ring as a signaling or recognition unit. The discussion focuses on the mechanism of the action described for recognizing the anion, the structure of the probes with the best synthetic simplicity, detection limits (LODs), application, and selectivity. In this context, the analysis involves probes for cyanide sensing first, then probes for fluoride sensing, and ultimately, dual probes that allow both species recognition.

Keywords: Cyanide, fluorescence, fluoride, fused azoles, imidazoles, molecular probes, photophysical properties, pyrazoles.

Graphical Abstract

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