Dual-channel sensing of CO2: Reversible solution-gel transition and gelation-induced fluorescence enhancement

Xin Zhang, Huifang Mu, Haimiao Li, Yu Zhang, Meng An, Xuhong Zhang, Juyoung Yoon, Haitao Yu

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


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.

Original languageEnglish
Pages (from-to)2764-2778
Number of pages15
JournalSensors and Actuators, B: Chemical
StatePublished - Feb 2018

Bibliographical note

Publisher Copyright:
© 2017 Elsevier B.V.


  • Aggregation-induced emission
  • Anion-activated strategy
  • Aroylhydrazone-derivatized organogelator
  • CO sensor
  • Solution-to-gel transition


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