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摘要
A novel fluorescent-colorimetric chemosensor 1,8-bis{2-{N-[2'-(8'-hydroxy-9,10-anthraquinon-1-yloxy)-ethyl] benzimidazoliumyl}ethoxy}-9',10'-anthraquinone hexafluorophosphate (3) was prepared and characterized by H-1 and C-13 NMR spectroscopies; its single crystal structure was also obtained. By fluorescence and UV titrations, H-1 NMR titrations, and HRMS and IR spectra, we explored the cation recognition performance of 3, and the results revealed that 3 was a highly effective chemosensor for Co2+. After mixing with Co2+, a distinct color change (from orange to red under visible light) was visible to naked eyes accompanied with remarkable fluorescence quenching. A hypochromatic shift (ca. 27 nm) and a new peak at 487 nm were observed in the absorption spectra of 3. Furthermore, 3 was also applied for the detection of Co2+ by using a smartphone with the calculated limit of detection down to 0.47 mu M.
- 出版日期2018-12-21
- 单位天津师范大学
