201. A novel rhodamine B and purine derivative-based fluorescent chemosensor for detection of palladium (II) ion
- Author
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Wang Zhengyi, Weixia Zhang, Wu Guowei, Xinxin Jin, Hongfei Lu, and Wei Chen
- Subjects
Detection limit ,Chemistry ,chemistry.chemical_element ,02 engineering and technology ,Crystal structure ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Fluorescence ,0104 chemical sciences ,Inorganic Chemistry ,chemistry.chemical_compound ,Materials Chemistry ,Rhodamine B ,Density functional theory ,Titration ,Physical and Theoretical Chemistry ,0210 nano-technology ,Selectivity ,Nuclear chemistry ,Palladium - Abstract
A new rhodamine B and purine-based colorimetric and fluorescent sensor RBTP for detection of Pd (II) cation was prepared and structurally characterized. Sensor RBTP shows high sensitivity and selectivity to Pd2+ in EtOH/H2O solution (3/2, v/v, pH 7.4, HEPES buffer, 0.5 mM). And sensor RBTP not only exhibited a naked-eye color change from colorless to pink, but also displayed “turn-on” fluorescent sensing for recognition and detection of Pd2+. The fluorescence titration analysis of sensor RBTP to Pd2+ exhibits a low the limit of detection (49.5 nM). A great linear relationship was found between the concentration of Pd2+ from 0 to 40 μM and the fluorescence intensity of RBTP. The crystal structure of RBTP was supported by X-ray diffraction. Meanwhile, the proposed sensing mechanism of RBTP binding to Pd2+ was supported by Job's plot, MS spectra study and density functional theory (DFT) study. Moreover, sensor RBTP could be made as test paper to quantitative detection for Pd (II) cation in water.
- Published
- 2019