一种新型香豆素衍生物接枝的二醛纤维素基荧光传感器，用于选择性和灵敏检测 Fe。
A novel coumarin derivative-grafted dialdehyde cellulose-based fluorescent sensor for selective and sensitive detection of Fe.
机构信息
Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2023 May 5;292:122378. doi: 10.1016/j.saa.2023.122378. Epub 2023 Jan 18.
A new fluorescent probe DAC-NCH with specific response to Fe was synthesized via condensation reaction between dialdehyde cellulose and coumarin derivative. This probe exhibited a significant "turn-off" fluorescence response to Fe, accompanied by the fluorescence color change from bright pink to colorless. DAC-NCH was highly selective for Fe and could achieve detection within a short time (<3 min). The detection limit of DAC-NCH for Fe was determined to be as low as 91.7 nM. The complexation mechanism of DAC-NCH with Fe was confirmed by Job's plot, FTIR analysis, H NMR titration, and density functional theory (DFT) calculations. In addition, DAC-NCH could be used for the determination of Fe in actual water samples, and DAC-NCH-embedded fluorescent membrane was able to serve as a reliable platform for the detection of Fe.
一种新的荧光探针 DAC-NCH 通过二醛纤维素和香豆素衍生物之间的缩合反应合成，对 Fe 具有特异性响应。该探针对 Fe 表现出显著的“关闭”荧光响应，伴随着荧光颜色从亮粉色变为无色。DAC-NCH 对 Fe 具有高度选择性，可以在短时间（<3 分钟）内进行检测。DAC-NCH 对 Fe 的检测限低至 91.7 nM。通过 Job 图、FTIR 分析、H NMR 滴定和密度泛函理论（DFT）计算证实了 DAC-NCH 与 Fe 的络合机制。此外，DAC-NCH 可用于实际水样中 Fe 的测定，并且嵌入 DAC-NCH 的荧光膜可以作为检测 Fe 的可靠平台。
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