摘要
A coumarin Shiff-base derivative, salicylaldehyde-N-（6-phenylazo-coumarin-3-formyl）-hydrazone（1）, was obtained by simple organic synthesis from cheap and commercially available starting materials. Sensor 1 exhibits a very weak fluorescence emission, however, in the presence of acetate ions ＂turn-on＂ fluorescence is observed, which results from binding-induced conformational restriction of the fluorophore. Importantly, sensor 1 can also be used as colorimetric chemosensor for the anions with strong basicity, which is easily observed from yellow to red by naked eyes. Consequently, compound 1 can behave as a colorimetric and fluorescence sensor for biologically important F-, CH3COO- and H2PO4- in the presence of the other anions tested such as Cl-, Br- and I- in dimethyl sulfoxide（DMSO）.
A coumarin Shiff-base derivative, salicylaldehyde-N-（6-phenylazo-coumarin-3-formyl）-hydrazone（1）, was obtained by simple organic synthesis from cheap and commercially available starting materials. Sensor 1 exhibits a very weak fluorescence emission, however, in the presence of acetate ions ＂turn-on＂ fluorescence is observed, which results from binding-induced conformational restriction of the fluorophore. Importantly, sensor 1 can also be used as colorimetric chemosensor for the anions with strong basicity, which is easily observed from yellow to red by naked eyes. Consequently, compound 1 can behave as a colorimetric and fluorescence sensor for biologically important F-, CH3COO- and H2PO4- in the presence of the other anions tested such as Cl-, Br- and I- in dimethyl sulfoxide（DMSO）.
基金
Supported by the Nanjing Forestry University Start-up Fund, China(No.163101026)
