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Ionic Liquid-Assisted Exfoliation of Two-Dimensional Metal–Organic Frameworks for Luminescent Sensing
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-01-31 , DOI: 10.1021/acssuschemeng.9b05684 Dongyin Liu 1 , Bing Liu 1 , Chan Wang 1 , Wei Jin 1 , Qijun Zha 1 , Gang Shi 1 , Dawei Wang 1 , Xinxin Sang 1 , Caihua Ni 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-01-31 , DOI: 10.1021/acssuschemeng.9b05684 Dongyin Liu 1 , Bing Liu 1 , Chan Wang 1 , Wei Jin 1 , Qijun Zha 1 , Gang Shi 1 , Dawei Wang 1 , Xinxin Sang 1 , Caihua Ni 1
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The exfoliation of two-dimensional metal–organic frameworks (2D MOFs) to prepare few-layered MOF nanosheets (MONs) has been of great interest in recent years. In this work, an efficient and environmentally friendly liquid-exfoliation method is developed to produce stable and high-concentration dispersions of few-layered Zn2(bim)4 MONs. Bulk Zn2(bim)4 can be successfully delaminated in ionic liquid and water mixed solvents, where the ionic liquid acts both as solvent and surfactant. The highest exfoliation rate is up to 47% with a [Omim]Cl volume ratio of 50%. In addition, the prepared Zn2(bim)4 MONs can be easily dispersed in an aqueous solution and stabilized for more than 2 weeks. Zn2(bim)4 MONs are used as a fluorescent sensor to detect metal ions in water and exhibit enhanced sensing ability for Fe3+ than bulk MOFs. The highly dispersive nature after delamination and easily accessible active sites on Zn2(bim)4 MON surface are all in favor of its high-performance in sensing.
中文翻译：
离子液体辅助剥落二维金属-有机骨架的发光传感
近年来，剥落二维金属有机骨架（2D MOF）以制备几层MOF纳米片（MONs）的兴趣很大。在这项工作中，开发了一种有效且环保的液体剥落方法，以生产稳定且高浓度的几层Zn 2（bim）4 MONs分散体。块状Zn 2（bim）4可以在离子液体和水混合溶剂中成功脱层，其中离子液体既充当溶剂又充当表面活性剂。在[Omim] Cl体积比为50％的情况下，最高剥落率高达47％。另外，制备的Zn 2（bim）4MONs可以很容易地分散在水溶液中并稳定超过2周。Zn 2（bim）4 MONs用作荧光传感器，用于检测水中的金属离子，并且对Fe 3+的感测能力比本体MOF增强。脱层后的高度分散性以及Zn 2（bim）4 MON表面上易于接近的活性位点均支持其高性能的感测。
更新日期：2020-02-03
中文翻译：
离子液体辅助剥落二维金属-有机骨架的发光传感
近年来，剥落二维金属有机骨架（2D MOF）以制备几层MOF纳米片（MONs）的兴趣很大。在这项工作中，开发了一种有效且环保的液体剥落方法，以生产稳定且高浓度的几层Zn 2（bim）4 MONs分散体。块状Zn 2（bim）4可以在离子液体和水混合溶剂中成功脱层，其中离子液体既充当溶剂又充当表面活性剂。在[Omim] Cl体积比为50％的情况下，最高剥落率高达47％。另外，制备的Zn 2（bim）4MONs可以很容易地分散在水溶液中并稳定超过2周。Zn 2（bim）4 MONs用作荧光传感器，用于检测水中的金属离子，并且对Fe 3+的感测能力比本体MOF增强。脱层后的高度分散性以及Zn 2（bim）4 MON表面上易于接近的活性位点均支持其高性能的感测。
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