Lv Rui, Li Hui, Su Jian, Fu Xin, Yang Boyi, Gu Wen, Liu Xin
College of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University , Tianjin 300071, P. R. China.
Inorg Chem. 2017 Oct 16;56(20):12348-12356. doi: 10.1021/acs.inorgchem.7b01822. Epub 2017 Oct 2.
A new luminescent Zn(II)-based metal-organic framework (MOF), [Zn(TPOM)(NDC)]·3.5HO (Zn-MOF; TPOM = tetrakis(4-pyridyloxymethylene)methane and Hndc = 2,6-naphthalenedicarboxylic acid), was successfully synthesized by a hydrothermal reaction. The MOF exhibits excellent luminescence emission, and it can detect Fe(III) and Cr(VI) ions with high selectivity, well antiinterference performance, and short response time. In addition, Zn-MOF was selected as a parent coordination compound to encapsulate Eu cations to obtain a Eu-incorporated sample (Eu@Zn-MOF). Subsequently, we explored the potential application of Eu@Zn-MOF as a probe for the selective sensing of Fe(III) and Cr(VI) ions, and it revealed that we could differentiate Fe(III) and Cr(VI) ions by the combination Zn-MOF and Eu@Zn-MOF. More importantly, it represents the first example of MOF-based luminescent sensors which can detect and differentiate Fe(III) and Cr(VI) ions selectively. And the possible sensing mechanism was discussed in detail.
通过水热反应成功合成了一种新型的基于锌（II）的发光金属有机框架（MOF），即[Zn(TPOM)(NDC)]·3.5H₂O（Zn-MOF；TPOM = 四（4-吡啶氧基甲基）甲烷，H₂ndc = 2,6-萘二甲酸）。该MOF表现出优异的发光性能，并且能够高选择性地检测Fe(III)和Cr(VI)离子，具有良好的抗干扰性能和较短的响应时间。此外，选择Zn-MOF作为母体配位化合物来封装Eu阳离子，从而获得了Eu掺杂样品（Eu@Zn-MOF）。随后，我们探索了Eu@Zn-MOF作为选择性传感Fe(III)和Cr(VI)离子探针的潜在应用，结果表明我们可以通过结合Zn-MOF和Eu@Zn-MOF来区分Fe(III)和Cr(VI)离子。更重要的是，这代表了基于MOF的发光传感器首次能够选择性地检测和区分Fe(III)和Cr(VI)离子的实例。并且详细讨论了可能的传感机制。
