A highly selective ratiometric fluorescent Cu2+ and HSO4ˉ probe based on a new photochromic diarylethene with a 6-aryl[1,2-c]quinazoline unit

摘要: Abstract A novel photochromic diarylethene was synthesized and its structure determined by single-crystal X-ray diffraction analysis. The can serve as a ratiometric fluorescent chemosensor for highly selective recognition of Cu2+ HSO4– ions, respectively. fluorometric titration showed two distinct processes. First, the emission intensity at 427 nm decreased notably strong peak 489 nm emerged when concentration less than 1.0 equiv. In second one, dramatically increased from 1.0 to 10.0 equiv. Furthermore, selectively recognize HSO4ˉ without any interference other anions. Upon addition in acetonitrile, red-shifted 64 nm enhanced 5-fold with notable fluorescence change blue bright cyan due formation anion/ligand (1:1) complex.