Abstract

Sensing technology for heavy metal detection is very crucial for recent decades as the detection method is very easy, rapid, and does not require any pre-treatment of the sample. Nickel is a trace element in the human body and basically a moderate toxic element. There is a limited number of chemo and fluoro sensors reported for nickel as compared to other transition metal ion. Therefore, there is a need for the detailed structure and property studies of the nickel-probes as the knowledge can help in the upcoming development of probes for the nickel. In this review, we have discussed about different colorimetric, fluorimetric and fluorescent chemosensor and their structure, characterization, detection limit, association constant, media, and bio-imaging studies if they are active.

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