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Dual-channel sensing of CO2: Reversible solution-gel transition and gelation-induced fluorescence enhancement
Sensors and Actuators B: Chemical ( IF 8.4 ) Pub Date : 2017-09-15 , DOI: 10.1016/j.snb.2017.09.091
Xin Zhang , Huifang Mu , Haimiao Li , Yu Zhang , Meng An , Xuhong Zhang , Juyoung Yoon , Haitao Yu

It is imperative for various applications to develop new sensing systems in the visualization and detection of CO2. Here, several aroylhydrazone-derivatized organogelators have been prepared and developed as CO2 sensors via the anion-activated strategy. These new compounds can gel some of polar and apolar organic solvents to form stable organogels which have been well characterized by field emission scanning electron microscopy (FE-SEM), FT-IR spectroscopy, concentration- and temperature-dependent 1H NMR spectra, PXRD, and UV–vis spectroscopy. In addition, they can show gelation-induced fluorescence enhancement performances which have been proven to derive from the aggregation-induced emission (AIE) effect. In particular, the fluoride anion-triggered solutions of the organogelators can permit naked-eye sensing of CO2 in air via the solution-to-gel transition. Besides, the developed gelation systems can also be used to provide quantitative means for CO2 stream through re-gelation induced fluorescence enhancement. Moreover, the reversibility of these sensing systems for the capture and release of CO2 enhances their applicable potential.



中文翻译:

CO 2的双通道传感:可逆溶液-凝胶转变和胶凝诱导的荧光增强

当务之急是在CO 2的可视化和检测中开发新的传感系统。在这里,已经制备了几种芳酰hydr衍生的有机胶凝剂,并通过阴离子活化策略开发为CO 2传感器。这些新化合物可以使某些极性和非极性有机溶剂胶凝形成稳定的有机凝胶,这些凝胶已通过场发射扫描电子显微镜(FE-SEM),FT-IR光谱,浓度和温度依赖性1进行了很好的表征。H NMR光谱,PXRD和UV-vis光谱。此外,它们还可以显示出胶凝诱导的荧光增强性能,这些性能已被证明源自聚集诱导发射(AIE)效应。特别地,有机胶凝剂的氟化物阴离子触发的溶液可以允许通过溶液-凝胶转变而用肉眼感测空气中的CO 2。此外,开发的凝胶化系统还可用于通过重新凝胶化诱导的荧光增强为CO 2流提供定量手段。此外,这些感测系统用于捕获和释放CO 2的可逆性增强了其可应用的潜力。

更新日期:2017-09-15
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