Dual-channel sensing of CO2: Reversible solution-gel transition and gelation-induced fluorescence enhancement
- 주제(키워드) Aroylhydrazone-derivatized organogelator , CO2 sensor , Anion-activated strategy , Aggregation-induced emission , Solution-to-gel transition
- 주제(기타) Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation
- 등재 SCIE, SCOPUS
- 발행기관 ELSEVIER SCIENCE SA
- 발행년도 2018
- URI http://www.dcollection.net/handler/ewha/000000149590
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.snb.2017.09.091
초록/요약
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 H-1 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. (C) 2017 Elsevier B.V. All rights reserved.
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