Dual-emissive polystyrene@zeolitic imidazolate framework-8 composite for ratiometric detection of singlet oxygen,Journal of Materials Chemistry B

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Dual-emissive polystyrene@zeolitic imidazolate framework-8 composite for ratiometric detection of singlet oxygen
Journal of Materials Chemistry B ( IF 6.1 ) Pub Date : 2017-11-06 00:00:00 , DOI: 10.1039/c7tb02684f
Jie Gao _{1,

2,

3,

4,

5} , Caihong Wang _{1,

2,

3,

4,

5} , Hongliang Tan _{1,

2,

3,

4,

5}

Affiliation

This work demonstrated the potential of zeolitic imidazolate framework-8 (ZIF-8) as a host for the co-encapsulation of multiple fluorescent cargos to fabricate fluorescent composites for ratiometric sensing. The one-pot self-assembly of 2-methylimidazole, zinc nitrate, 9-anthracenecarboxylic acid (AnC), and polystyrene sphere doped with europium chelate (EuPS) in methanol solution can lead to the formation of dual-emissive EuPS@AnC/ZIF-8 with excellent fluorescent activity. Based on the distinct fluorescent responses of Eu³⁺ and AnC to singlet oxygen (¹O₂), EuPS@AnC/ZIF-8 can be developed as a ratiometric sensor for ¹O₂ detection. In this ratiometric sensor, Eu³⁺ fluorescence was employed as a reference signal for providing built-in correction to avoid environmental effects, while AnC fluorescence served as a response signal to detect ¹O₂ because of its turn-off behavior upon reacting with ¹O₂. Benefiting from the confinement effect of the ZIF-8 host, the presented sensor showed high sensitivity toward ¹O₂ with a detection limit of 43 nM and excellent selectivity over other reactive oxygen species. More attractively, the target responsive fluorescent color change of EuPS@AnC/ZIF-8 allowed ¹O₂ to be easily identified by the naked eye under a UV lamp. We hope that this study will provide a new insight into the design and application of multifunctional composites based on metal–organic frameworks.

中文翻译：

双发射聚苯乙烯@沸石咪唑酸酯骨架8复合材料用于单重态氧的比例检测

这项工作证明了沸石咪唑盐骨架8（ZIF-8）作为宿主的潜力，可以共包封多个荧光货物以制造用于比率传感的荧光复合材料。一锅自组装的2-甲基咪唑，硝酸锌，9-蒽羧酸（AnC）和掺杂styrene螯合物（EuPS）的聚苯乙烯球在甲醇溶液中会导致双发射EuPS @ AnC / ZIF的形成-8具有出色的荧光活性。基于Eu ³⁺和AnC对单线态氧（¹ O ₂）的不同荧光响应，可以开发EuPS @ AnC / ZIF-8作为用于¹ O ₂检测的比例传感器。在这种比例式传感器中，Eu ³⁺荧光被用作提供内置校正以避免环境影响的参考信号，而AnC荧光则被用作检测¹ O ₂的响应信号，因为它在与¹ O ₂反应时会熄灭。受益于ZIF-8宿主的限制作用，所提出的传感器对¹ O ₂表现出高灵敏度，检测极限为43 nM，并且与其他活性氧物种相比具有出色的选择性。更具吸引力的是，EuPS @ AnC / ZIF-8的目标响应荧光颜色变化允许¹ O ₂可以在紫外线灯下用肉眼轻松识别。我们希望这项研究将为基于金属有机框架的多功能复合材料的设计和应用提供新的见解。

更新日期：2017-11-17

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