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Mini-Reviews in Organic Chemistry

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ISSN (Online): 1875-6298

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Review Article

Azo Based Chromogenic Sensor: An Approach for Naked Eye Detection of Biologically Relevant Anions and Metal Cations

Author(s): Kanchan Ramsingh Damade and Dhananjay Hiraman More*

Volume 21, Issue 5, 2024

Published on: 12 June, 2023

Page: [514 - 526] Pages: 13

DOI: 10.2174/1570193X20666230228115500

Price: $65

Abstract

It was previously reported that azo compounds are vigorous and chemically stable compounds and well-known chromophores. Having different chromophores, the azo dyes act as probing units for capturing the charged particles either by electron transfer or deprotonation mechanisms. The probing efficiency usually exhibits in the magnitude of variations in UV absorbance, NMR peaks and visually observed color changes. The sensing application is a prerequisite for numerous analytical techniques involved in pharmaceutical as well as pathological discipline. In the last two decades, numerous azo based sensors have been developed, which render low cost and effective sensing approaches towards ionic diagnosis through instantaneous eye beaming chromogenic change. This sensing approach is simple, cost-effective, and precise and provides reliable quantitative and qualitative statistics of an analyte present in a complex environment. Our present study culminates the recent progress on the synthesis of azo compounds and their chromogenic sensing application towards various reactive analytes through reviewing spectral variations and colorimetric observations. This review article assesses the potential of azo dyes in chromogenic sensing for different analytes. We believe this review will be of interest and important for researchers working on designing azo-based chromogenic sensors.

Keywords: Chromogenic sensor, metal cations, chemosensors, supramolecular chemistry, anions, chromophores.

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