Title:Azo Based Chromogenic Sensor: An Approach for Naked Eye Detection of Biologically Relevant Anions and Metal Cations
Volume: 21
Issue: 5
Author(s): Kanchan Ramsingh Damade and Dhananjay Hiraman More*
Affiliation:
- School of Chemical Sciences, Kavayitri Bahinabai Chaudhari North Maharashtra University, Jalgaon, India
Keywords:
Chromogenic sensor, metal cations, chemosensors, supramolecular chemistry, anions, chromophores.
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.