AIE-active metal–organic frameworks: facile preparation, tunable light emission, ultrasensitive sensing of copper(II) and visual fluorescence detection of glucose,Journal of Materials Chemistry C

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AIE-active metal–organic frameworks: facile preparation, tunable light emission, ultrasensitive sensing of copper(II) and visual fluorescence detection of glucose
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2020-07-01 , DOI: 10.1039/d0tc00106f
Siqi Xie _{1,

2,

3,

4,

5} , Qi Liu _{1,

2,

3,

4,

5} , Fawei Zhu _{1,

2,

3,

4,

5} , Miao Chen _{1,

2,

3,

4,

5} , Lumin Wang _{1,

2,

3,

4,

5} , Yu Xiong _{5,

6,

7,

8} , Yuqiu Zhu _{1,

2,

3,

4,

5} , Yu Zheng _{1,

2,

3,

4,

5} , Xiaoqing Chen _{1,

2,

3,

4,

5}

Affiliation

By binding aggregation-induced emission luminogens (AIEgens) with nanoscale ZIF-8, a series of novel luminescent metal–organic frameworks (LMOFs) with good photostability and excellent dispersibility have been facilely fabricated. The developed AIE-active MOFs not only inherit the intriguing AIE properties of AIEgens, including excited-state intramolecular proton transfer (ESIPT) properties, intense solid-state luminescence and large Stokes shifts (115–202 nm), but also show surprisingly boosted fluorescent emission efficiency (over 16 times) when compared with the original fluorescence of AIEgens. Meanwhile, the emission of AIE-active MOFs could also be finely engineered by varying the substituents on AIEgens. And as a proof of concept, the selected AIE-active MOF-2 (LMOF-2) served as a novel fluorescent probe for detecting copper ions (Cu²⁺), and a considerable response range (1–100 nM) and a sensitive picomolar detection limit (550 pM) were favorably obtained. More importantly, based on a glucose oxidase (GOD) catalyzed cascade redox reaction of LMOF-2/GOD nanocomposites, a fluorescent allochroic test strip was favourably developed for visual detection of glucose within a normal concentration range of fasting blood-glucose in human sera (3–8 mM), and has great potential to be applied in on-site assay of glucose in real serum samples due to its praiseworthy specificity and selectivity.

中文翻译：

AIE活性金属-有机框架：制备简便，可调节的发光，对铜（II）的超灵敏感测和葡萄糖的可见荧光检测

通过将聚集诱导的发光原（AIEgens）与纳米级ZIF-8结合，可以轻松地制造出一系列具有良好的光稳定性和优异的分散性的新型发光金属有机骨架（LMOF）。先进的AIE活性MOF不仅继承了AIEgens令人着迷的AIE特性，包括激发态分子内质子转移（ESIPT）特性，强固态发光和大的斯托克斯位移（115-202 nm），而且还显示出令人惊讶的荧光增强与AIEgens的原始荧光相比发射效率（超过16倍）。同时，也可以通过改变AIEgens上的取代基来精细设计AIE活性MOF的发射。作为概念验证，所选的AIE活性MOF-2（LMOF-2）用作检测铜离子（Cu²⁺），并获得了可观的响应范围（1-100 nM）和敏感的皮摩尔检测极限（550 pM）。更重要的是，基于葡萄糖氧化酶（GOD）催化的LMOF-2 / GOD纳米复合材料的级联氧化还原反应，开发了一种荧光异色测试条，用于在人血清中空腹血糖正常浓度范围内目测葡萄糖（ 3–8 mM），并且由于其令人称赞的特异性和选择性，在实际血清样品中葡萄糖的现场分析中具有巨大的潜力。

更新日期：2020-08-06

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