Anion-activated, thermoreversible gelation system for the capture, release, and visual monitoring of CO2

Xin Zhang, Songyi Lee, Yifan Liu, Minji Lee, Jun Yin, Jonathan L. Sessler, Juyoung Yoon

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Carbon dioxide (CO2) is an important green house gas. This is providing an incentive to develop new strategies to detect and capture CO 2. Achieving both functions within a single molecular system represents an unmet challenge in terms of molecular design and could translate into enhanced ease of use. Here, we report an anion-activated chemosensor system, NAP-chol 1, that permits dissolved CO2 to be detected in organic media via simple color changes or through ratiometric differences in fluorescence intensity. NAP-chol 1 also acts as a super gelator for DMSO. The resulting gel is transformed into a homogeneous solution upon exposure to fluoride anions. Bubbling with CO2 regenerates the gel. Subsequent flushing with N 2 or heating serves to release the CO2 and reform the sol form. This series of transformations is reversible and can be followed by easy-to-discern color changes. Thus, NAP-chol 1 allows for the capture and release of CO2 gas while acting as a three mode sensing system. In particular, it permits CO2 to be detected through reversible sol-gel transitions, simple changes in color, or ratiometric monitoring of the differences in the fluorescence features.

Original languageEnglish
Article number4593
JournalScientific Reports
StatePublished - 4 Apr 2014

Bibliographical note

Funding Information:
This work was also supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2012R1A3A2048814 to J.Y.). The work was also supported by the U.S. National Science Foundation (NSF) (no. CHE-1057904 to J.L.S.).


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