A chiral lanthanide metal-organic framework for selective sensing of Fe(III) ions
A chiral lanthanide metal-organic framework for selective sensing of Fe(III) ions
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用于选择性传感 Fe(III) 离子的手性镧系元素金属有机框架
DOI：
10.1039/c5dt03283k
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发表时间：
2016
影响因子：
4
通讯作者：
Bu Xian-He
中科院分区：
文献类型：
--
作者：
Zhao Xiao-Lin;Tian Dan;Gao Qiang;Sun Hong-Wei;Xu Jian;Bu Xian-He
在水热条件下，通过引入四羧酸配体（H4 bptc）作为发色团敏化Tb ~（3+）离子的发光，合成了一种新型的发光镧系金属-有机骨架材料。有趣的是，尽管H4 bptc的非手性性质，所得的框架表现出罕见的手性螺旋通道。发光研究表明，该材料对悬浮液中的Fe ~（3+）离子表现出高度选择性的荧光猝灭响应，在紫外光下可以方便地用肉眼观察到。因此，该材料可以潜在地用作用于感测Fe 3+离子的化学传感器，并且其选择性发光猝灭响应可以用竞争吸收机制来解释。
A new luminescent lanthanide metal–organic framework was synthesized under hydrothermal conditions by introducing the tetracarboxylic acid ligand (H4bptc) as a chromophore to sensitize the luminescence of the Tb3+ ion. Interestingly, despite the achiral nature of H4bptc, the resulting framework exhibited rare chiral helical channels. The luminescence studies revealed that this material showed a highly selective fluorescence quenching response to Fe3+ ions in liquid suspension, which can be conveniently observed by the naked eye under UV light. Thus, this material can be potentially used as a chemosensor for sensing Fe3+ ions and its selective luminescence quenching response can be explained in terms of the competitive absorption mechanism.