Overview of the chemosensor ligands used for selective detection of anions and metal ions (Zn2+, Cu2+, Ni2+, Co2+, Fe2+, Hg2+)

Chemosensors possess significant importance in biological and environmental systems for the detection of various chemical species. This review commences with a short description of most commonly used chemosensor ligands for anions and metal ions viz. Zn2+, Cu2+, Ni2+, Co2+, Fe2+ and Hg2+. We also summarize anion sensing, pH, selectivity and sensitivity, stoichiometry ratio of various chemosensor ligands. This review mainly focuses for the selectivity of chemosensor on particular metal ions.