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Sequential and recyclable sensing of Fe3+ and ascorbic acid in water with a terbium(III)-based metal–organic framework

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Abstract

A water-stable three-dimensional (3D) metal–organic framework (MOF) of {[Tb(Cmdcp)(H2O)3]2(NO3)2·5H2O}n (1, H3CmdcpBr = 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 Fe3+ due to the partial overlap of its excitation spectrum with the absorption spectrum of Fe3+. The subsequent introduction of ascorbic acid (AA) leads to the reduction of Fe3+ into Fe2+, 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.

Graphical abstract: Sequential and recyclable sensing of Fe3+ and ascorbic acid in water with a terbium(iii)-based metal–organic framework

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Publication details

The article was received on 27 Feb 2019, accepted on 13 May 2019 and first published on 14 May 2019


Article type: Paper
DOI: 10.1039/C9DT00871C
Dalton Trans., 2019, Advance Article

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    Sequential and recyclable sensing of Fe3+ and ascorbic acid in water with a terbium(III)-based metal–organic framework

    K. Wu, L. Qin, C. Fan, S. Cai, T. Zhang, W. Chen, X. Tang and J. Chen, Dalton Trans., 2019, Advance Article , DOI: 10.1039/C9DT00871C

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