A functional applied material on recognition of metal ion zinc based on the double azine compound

摘要

A colorimetric and fluorescent probe >L has been designed and synthesized, which bearing the double azine moiety and showing a detection limit of 2.725 × 10⁻⁷ M towards Zn²⁺. Based on the basic recognition mechanism of ESIPT and CHEF effect, the >L has high selectivity and sensitivity to only Zn²⁺ (not Fe³⁺, Hg²⁺, Ag⁺, Ca²⁺, Co²⁺, Ni²⁺, Cd²⁺, Pb²⁺, Cr³⁺, and Mg²⁺) within the physiological pH range (pH = 7.0–8.4) and showed a fluorescence switch. Moreover, this detection progress occured in the DMSO/H2O ∼ HEPES buffer (80/20, v/v; pH 7.23) solution which can conveniently used on test strip.