A novel sensitive fluorescent probe of S2O82− and Fe3+ based on covalent post-functionalization of a zirconium(iv) metal–organic framework†,Dalton Transactions

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A novel sensitive fluorescent probe of S2O82− and Fe3+ based on covalent post-functionalization of a zirconium(iv) metal–organic framework†
Dalton Transactions ( IF 3.5 ) Pub Date : 2018-07-28 00:00:00 , DOI: 10.1039/c8dt02051e
Shu-Yin Zhu _{1,

2,

3,

4} , Bing Yan _{1,

2,

3,

4}

Affiliation

A zirconium metallic organic framework UiO-66-NH₂ has been synthesized and is further modified with imidazole-2-carboxaldehyde by a covalent post synthetic route which is based on a Schiff-base reaction. The as-prepared, functionalized MOF named UiO-66-NH₂-IM is fully characterized. It retains its structural integrity during the PSM process and shows excellent luminescence and good fluorescence stability in water. It has also been further utilized as a sensitive fluorescent probe for sensing ions. The results show that UiO-66-NH₂-IM can be developed into a highly selective and sensitive sensor for the detection of S₂O₈²⁻ (detection limit, 8.63 μM) and Fe³⁺ ions (detection limit, 4.95 μM) by fluorescence quenching of UiO-66-NH₂-IM. All the possible mechanisms involved are discussed. Remarkably, it is the first covalent post-synthesized MOF to be developed as a colorimetric fluorescent sensor for the detection of S₂O₈²⁻ and Fe³⁺.

中文翻译：

基于Z （iv）金属-有机骨架共价后官能化的新型S ₂ O ₈^2-和Fe ³⁺敏感荧光探针†

已经合成了锆金属有机骨架UiO-66-NH _2，并通过基于Schiff碱反应的共价后合成路线用咪唑-2-甲醛进一步进行了改性。完整表征了名为UiO-66-NH ₂ -IM的功能化MOF 。它在PSM过程中保持其结构完整性，并在水中显示出出色的发光性和良好的荧光稳定性。它还被进一步用作敏感离子的荧光探针。结果表明，UiO-66-NH ₂ -IM可以发展成为一种高度选择性和灵敏的传感器，用于检测S ₂ O ₈^2-（检出限为8.63μM）和Fe ³⁺UiO-66-NH ₂ -IM的荧光猝灭处理产生的离子（检测限，4.95μM）。讨论了所有可能的机制。值得注意的是，它是第一个开发用于检测S ₂ O ₈^2-和Fe ³⁺的比色荧光传感器的共价后合成MOF 。

更新日期：2018-07-28

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