基于铽（III）的金属有机框架对水中铁和抗坏血酸的顺序及可循环传感
Sequential and recyclable sensing of Fe and ascorbic acid in water with a terbium(iii)-based metal-organic framework.
作者信息
Wu Ke-Yang, Qin Liang, Fan Cheng, Cai Shao-Lan, Zhang Ting-Ting, Chen Wen-Hua, Tang Xiao-Yan, Chen Jin-Xiang
机构信息
Guangdong Provincial Key Laboratory of New Drug Screening and Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, Guang Dong, China.
School of Biotechnology and Health Sciences, International Healthcare Innovation Institute (Jiangmen), Wuyi University, Jiangmen 529040, Gang Dong, China.
出版信息
Dalton Trans. 2019 Jun 28;48(24):8911-8919. doi: 10.1039/c9dt00871c. Epub 2019 May 30.
A water-stable three-dimensional (3D) metal-organic framework (MOF) of {Tb(Cmdcp)(HO)·5HO} (1, HCmdcpBr = N-carboxymethyl-(3,5-dicarboxyl)pyridinium bromide) has been synthesized and characterized. MOF 1 is highly emissive, giving rise to green luminescence that can be quenched by Fe due to the partial overlap of its excitation spectrum with the absorption spectrum of Fe. The subsequent introduction of ascorbic acid (AA) leads to the reduction of Fe into Fe, accompanied by the near-entire recovery of MOF 1 emission. The density functional theory (DFT) calculation results support the proposed mechanism. Such a sensing cycle is further transferable to urine and serum samples with a satisfactory near-quantitative recovery, highlighting its good potential in biologically relevant applications.
已合成并表征了一种水稳定的三维（3D）金属有机框架（MOF）{Tb(Cmdcp)(H₂O)·5H₂O}（1，HCmdcpBr = N-羧甲基-(3,5-二羧基)吡啶溴化物）。MOF 1具有高发射性，发出绿色荧光，由于其激发光谱与Fe的吸收光谱部分重叠，该荧光可被Fe猝灭。随后引入抗坏血酸（AA）导致Fe还原为Fe²⁺，同时MOF 1的荧光几乎完全恢复。密度泛函理论（DFT）计算结果支持所提出的机制。这种传感循环可进一步转移到尿液和血清样本中，具有令人满意的近定量回收率，突出了其在生物相关应用中的良好潜力。
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