A novel fluorescence probe for the recognition of Cd2+ and its application.

[Display omitted] • BQBH with quinoline fluorophore was synthesized and characterized. • BQBH exhibits highly sensitivity fluorescence enhancement to Cd2+ along with significant color change. • Limit of detection (LOD) for Cd2+ was reached the level of μM. • BQBH was successfully applied in the detection of Cd2+ on test paper and cell imaging. A facile fluorescence probe BQBH was synthesized and investigated on its spectrum property. The result showed that the BQBH had high sensitivity and selectivity for Cd2+ with lowest detection determined as 0.14 μM by fluorescence response. The 1: 1 binding ratio between BQBH and Cd2+ was determined by Job's plot, and the binding details were further confirmed by 1H NMR titration, FT-IR spectrum and HRMS analysis. The applications including on test paper, smart phone and cell image were all also investigated. [ABSTRACT FROM AUTHOR]