2-Hydroxy-1-((2-(pyridin-2-yl)hydrazono)methyl)tryptanthrin as a Fluorescent Chemosensor for Metal Ions

抄録

2-Hydroxy-1-((2-(pyridin-2-yl)hydrazono)methyl)tryptanthrin (T2OH1CH=N-NH-Pyri) was synthesized and applied as a fluorescent chemosensor for metal ions. We investigated the metal-ion recognition of T2OH1CH=N-NH-Pyri in separate Li⁺, Na⁺, K⁺, Mg²⁺, Ca²⁺, Ba²⁺, Fe²⁺, Fe³⁺, Co²⁺, Ni²⁺, Cu²⁺, Ag⁺, Zn²⁺, Cd²⁺, Al³⁺, and Pb²⁺ acetonitrile solutions. Li⁺, Na⁺, K⁺, Ca²⁺, Ba²⁺, and Ag⁺ had no effect on the shape and intensity of the fluorescence spectrum of the chemosensor. T2OH1CH=N-NH-Pyri formed a 1:1 complex with Mg²⁺, Fe²⁺, Fe³⁺, Co²⁺, Ni²⁺, Cu²⁺, Zn²⁺, Cd²⁺, Al³⁺, and Pb²⁺. The fluorescence intensity of the sensor increased for Mg²⁺, Zn²⁺, Cd²⁺, Al³⁺, and Pb²⁺, and decreased for Fe²⁺, Fe³⁺, Co²⁺, Ni²⁺, and Cu²⁺.