A heptamethine cyanine-based colorimetric and ratiometric fluorescent chemosensor for the selective detection of Ag+ in an aqueous medium

Abstract

A highly selective and sensitive ratiometric fluorescent chemosensor for Ag⁺ in aqueous solution was developed, in a linear range of 0.6 × 10⁻⁷ to 50 × 10⁻⁷ mol L⁻¹, based on a A–Ag⁺–A binding mode with a heptamethine cyanine motif containing one adenine moiety.