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Methylated Eu(III) metal-organic framework as a fluorescent probe for constructing molecular logic gates and monitoring of F−, I−, and S2−

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Abstract

A novel fluorescent and electron-deficient hybrid, N-methylated [Eu (pddb)phen(ox)0.5]n (Eu-MOF-Me) has been prepared via post-synthetic modification. Considering its special luminescent properties and cationic framework, Eu-MOF-Me is developed as a visualized fluorescent probe. Notably, water-stable Eu-MOF-Me exhibits advantages like good structural and fluorescent stability in a wide range of pH value (3.39–10.86), excellent identification ability for F−, I−, and S2− (it can easily distinguish F− and I− from other halogen ions and can realize naked eye identification of F−, I−, and S2−), relatively low detection limits (6.61 μM for S2−, 7.57 μM for F−), and reusability. More importantly, it has been utilized for the construction of a Boolean logic gate system. In this system, Eu-MOF-Me serves as the gate, by taking F−, I−, and S2− as the inputs and fluorescence emission bands (UV380, B437, and R612) as the outputs; some primary logic gates (NOR, IMP, YES, NOT) and the combination of them have been realized. Moreover, we achieved a cascaded logic gate (NOR+OR). For further application, a molecular computing keypad-lock security system has been obtained.

A novel fluorescent and electron-deficient hybrid named Eu-MOF-Me has been prepared via post-synthetic methylation. Considering its special luminescent properties and cationic framework, Eu-MOF-Me was developed as a fluorescent probe for the visual monitoring of important anions. In addition, it was used for the construction of Boolean logic library and a keypad-lock system was achieved

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Funding

This work was supported by the National Natural Science Foundation of China (21971194), Developing Science Funds of Tongji University, and the Science & Technology Commission of Shanghai Municipality (14DZ2261100).

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Authors and Affiliations

  1. School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, China

    Jie Min, Xiang-Long Qu & Bing Yan

  2. School of Materials Science and Engineering, Liaocheng University, Liaocheng, 252059, China

    Bing Yan

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  1. Jie Min
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Min, J., Qu, XL. & Yan, B. Methylated Eu(III) metal-organic framework as a fluorescent probe for constructing molecular logic gates and monitoring of F−, I−, and S2−. Microchim Acta 187, 434 (2020). https://doi.org/10.1007/s00604-020-04417-1

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