A highly stable 8-hydroxyquinolinate-based metal–organic framework as a selective fluorescence sensor for Fe3+, Cr2O72− and nitroaromatic explosives,Inorganic Chemistry Frontiers

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A highly stable 8-hydroxyquinolinate-based metal–organic framework as a selective fluorescence sensor for Fe3+, Cr2O72− and nitroaromatic explosives
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2020-09-22 , DOI: 10.1039/d0qi01032d
Quan Sun _{1,

2,

3,

4,

5} , Kun Yang _{1,

2,

3,

4,

5} , Wenna Ma _{1,

2,

3,

4,

5} , Liyan Zhang _{1,

2,

3,

4,

5} , Guozan Yuan _{1,

2,

3,

4,

5}

Affiliation

An 8-hydroxyquinolinate-based metal–organic framework [Zn(L)]·2MeOH·H₂O (1) was synthesized for the first time by treating a novel 8-hydroxyquinolinate ligand H₂L involving two carboxylate groups with zinc salt. Based on single-crystal X-ray analysis, the Zn-MOF exhibits a porous framework assembled from interlinked nanotubes that are constructed from three 4₃ helices. Complex 1 possesses excellent stability in both water and common organic solvents, which is conducive to its utility as a chemical sensor. The fluorescent sensing studies indicated that 1 can detect Fe³⁺ in aqueous solution with high sensitivity and selectivity even in the presence of other interfering metal cations. The recyclability and possible mechanism of 1 in the Fe³⁺ sensing process have been demonstrated. Additionally, fluorescent 1 is capable of sensing Cr₂O₇²⁻ in aqueous solution and nitroaromatic explosives in DMF. High selectivity and sensitivity were observed by fluorescence quenching effects. The above observations suggested that 1 can be considered as a potential fluorescent sensor for detecting Fe³⁺, Cr₂O₇²⁻ and nitroaromatic explosives.

中文翻译：

高度稳定的基于8-羟基喹啉酸酯的金属有机框架，可作为Fe3 +，Cr2O72-和硝基芳族炸药的选择性荧光传感器

通过用锌盐处理涉及两个羧酸根的新型8-羟基喹啉酸酯配体H ₂ L，首次合成了基于8-羟基喹啉酸酯的金属有机骨架[Zn（L）]·2MeOH·H ₂ O（1）。基于单晶X射线分析，Zn-MOF展示了由相互交联的纳米管组装而成的多孔骨架，这些纳米管由三个4 _{3 3}螺旋构成。配合物1在水和普通有机溶剂中均具有出色的稳定性，这有利于其用作化学传感器。荧光传感研究表明1可以检测到Fe ³⁺即使在存在其他干扰金属阳离子的情况下，也能以高灵敏度和高选择性在水溶液中溶解。已经证明了Fe ³⁺传感过程中1的可回收性和可能的机理。此外，荧光剂1能够感应水溶液中的Cr ₂ O ₇^2-和DMF中的硝基芳族炸药。通过荧光猝灭效应观察到高选择性和灵敏度。上述观察结果表明，可以将1视为检测Fe ³⁺，Cr ₂ O ₇^2-和硝基芳族炸药的潜在荧光传感器。

更新日期：2020-11-03

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