Key Laboratory of Chemical Synthesis and Pollution Control of Sichuan Province, School of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002, China.
Key Laboratory of Chemical Synthesis and Pollution Control of Sichuan Province, School of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2022 Oct 15;279:121461. doi: 10.1016/j.saa.2022.121461. Epub 2022 Jun 6.
To develop Al fluorescent sensor is significant because the abnormal levels of Al in environment may pose great threat to human body. Herein, a novel metal-organic framework {Zn(Dpada)(Imdba)·HO} (Dpada = 3, 6-di(1H-imidazol-1-yl) pyridazine and Imdba = 2, 2'-iminodibenzoic acid), named Zn-MOF, has been architected with one-dimensional channel under hydrothermal conditions. Zn-MOF exhibits good thermal and solvent stability and can also keep structural integrity over the pH range of 5.0 - 9.0. Fluorescent experiments show that Zn-MOF has high selectivity and sensitivity towards Al via ratiometric fluorescence signal changes (F/F) and the detection limit is evaluated to be 0.69 μM. In addition, Zn-MOF performs good recyclability in sensing of Al with at least 5 cycles. Besides, an INHIBIT logic gate has been constructed with chemical ions (Al, Cr, Fe and Hg) as input signals and emission ratio (F/F) as output signal. Significantly, Zn-MOF can be applied to tracing Al using real water samples, presenting great potential in water quality monitoring application.
开发 Al 荧光传感器具有重要意义，因为环境中异常水平的 Al 可能对人体造成极大威胁。在此，我们构建了一种新型的金属有机骨架 {Zn(Dpada)(Imdba)·HO}（Dpada = 3,6-二(1H-咪唑-1-基)哒嗪，Imdba = 2,2'-亚氨基二苯甲酸），命名为 Zn-MOF，它在水热条件下形成了一维通道。Zn-MOF 表现出良好的热稳定性和溶剂稳定性，并且在 pH 值为 5.0-9.0 的范围内仍能保持结构完整性。荧光实验表明，Zn-MOF 对 Al 具有高选择性和灵敏度，通过比率荧光信号变化（F/F）进行检测，检测限评估为 0.69 μM。此外，Zn-MOF 在 Al 的传感中具有良好的可回收性，至少可进行 5 个循环。此外，我们还构建了一个基于化学离子（Al、Cr、Fe 和 Hg）作为输入信号和发射比（F/F）作为输出信号的 INHIBIT 逻辑门。重要的是，Zn-MOF 可用于实际水样中 Al 的追踪，在水质监测应用中具有很大的潜力。
