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Sequential and recyclable sensing of Fe 3+ and ascorbic acid in water with a terbium(iii)-based metal-organic framework

Sequential and recyclable sensing of Fe 3+ and ascorbic acid in water with a terbium(iii)-based metal-organic framework

Ke-Yang Wu, Liang Qin, Cheng Fan, Shao-Lan Cai, Ting-Ting Zhang, Wen-Hua Chen, Xiao-Yan Tang, Jin-Xiang Chen

Dalton Trans. 2019 Jun 28;48(24):8911-8919.

PMID: 31143896

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS777111	(12-Dodecylphosphonic acid)pyridinium bromide			Price

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