A novel cation ‘AND’ anion recognition host having pyrido[1′,2′: 1,2]-imidazo[4,5-b]pyrazine as the fluorophore
Abstract
Novel fluorescent pyrido[1′,2′: 1,2]imidazo[4,5-b]pyrazine derivatives having a crown ether side-arm, 1a, b, recognise alkaline earth metal cations and thiocyanate anions coincidentally, making a function as an AND logic gate which has fluorescence quenching output.