A layer-structured Eu-MOF as a highly selective fluorescent probe for Fe3+ detection through a cation-exchange approach
A layer-structured Eu-MOF as a highly selective fluorescent probe for Fe3+ detection through a cation-exchange approach
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DOI：
10.1039/c2jm32661
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发表时间：
2012-01-01
影响因子：
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通讯作者：
Zhang, Hongjie
中科院分区：
文献类型：
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作者：
Dang, Song;Ma, En;Zhang, Hongjie
在水热条件下合成了一系列新的镧系金属有机骨架LnL（Ln = La，Y，Eu，Tb，Gd）。通过单晶和粉末X射线衍射分析，证实了这五个化合物都是同构的。该化合物具有层状结构，[H2 NMe 2]（+）阳离子位于层间通道中，其可以容易地被许多金属离子取代。最有趣的是，化合物EuL作为一个罕见的例子，高选择性和灵敏度的发光传感器的Fe 3+离子的基础上，通过阳离子交换的Eu-发光的总猝灭。进一步探讨了可能的传感机制。值得注意的是，它是第一种在生物系统中表现出优异的Fe 3+离子检测能力的Eu-MOF发光材料。
A new series of lanthanide metal-organic frameworks, LnL (Ln = La, Y, Eu, Tb, and Gd), were prepared under hydrothermal conditions. The five compounds are all isostructural as confirmed by the analyses of single crystal and powder X-ray diffractions. The compounds exhibit layer-like structures with the [H2NMe2](+) cations being located in the interlayer channels, which can be easily replaced by a number of metal ions. Most interestingly, compound EuL performs as a rare example of a highly selective and sensitive luminescence sensor for Fe3+ ions based on total quenching of the Eu-luminescence via cation-exchange. The possible sensing mechanism was further explored in detail. Remarkably, it is the first Eu-MOF luminescent material to exhibit an excellent ability for the detection of Fe3+ ions in a biological system.