A succinct enhanced luminescence strategy for fluorescent ionic liquids and the application for detecting CO2

An interesting phenomenon was found that fluorophore was introduced into ionic liquid (IL) to magnify fluorescence signal via the thermally activated delayed fluorescence process; thus up to 15 fold enhancements were achieved. Hence, we reported a succinct enhanced luminescence strategy to reduce single-triplet energy split by the tunability of ILs. This strategy could be extended to more kinds of ILs by the virtue of a preliminary DFT calculation screening. Moreover, the optical feature of IL sensor made it a promising candidate as a gas fluorescence sensor. (c) 2021 Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Automated summary

The introduction of fluorophore into ionic liquid (IL) to amplify fluorescence signal via thermally activated delayed fluorescence process resulted in up to 15 fold enhancements. This enhanced luminescence strategy can reduce single-triplet energy split by the tunability of ILs, and has the potential to be extended to more IL types. Additionally, the optical feature of IL sensor makes it a promising candidate for gas fluorescence sensor applications.