Synthesis Of 3-Substituted-1, 5-Diarylformazans For Their Use As Naked Eye Chemical Sensor For Detection Of Cu2+ And Hg2+

A differently substituted series of synthesised and characterized 3-cyano-1,5-diarylformazans and 3- nitro-1,5-diarylformazans have been investigated for their colorimetric response towards metal ions Na+ , K+ , Ba²⁺, Cu²⁺, Pb²⁺,Ni²⁺, Co²⁺, Zn²⁺, Ag1+, Cd²⁺, Mn²⁺, Sr²⁺, Fe²⁺, Al³⁺ and Hg²⁺ in THF-water (2:3 v/v) using 10mM borate buffer and cetylpyridinium chloride (CPC) as surfactant. It has been found that the transition metal ion particularly Cu2+ and Hg+2 respond very well in aqueous solutions between pH 9-10 to the compounds under study.