We report a copolymeric fluorescent sensor that is selective for lithium chloride. The two constituent polymers comprise pendent triphenylethylene (TPE) moieties for aggregate induced emission (AIE) along with either strapped-calixpyrrole or secondary ammonium groups that drive aggregation via self-assembly upon polymer mixing. Addition of LiCl in acetonitrile disrupts the strapped-calixpyrrole/secondary ammonium chloride salt host–guest crosslinks leading to disaggregation of the polymer chains and a decrease in TPE emission. The lack of AIE perturbation upon addition of NaCl, KCl, MgCl2 or CaCl2 provides for high selectivity for LiCl relative to potential interferants. This supramolecular dual polymer approach could serve as a complement to more traditional sensor systems.
|Original language||English (US)|
|State||Published - Mar 22 2023|
Bibliographical noteKAUST Repository Item: Exported on 2023-04-10
Acknowledged KAUST grant number(s): OSR-2019-CRG8-4032
Acknowledgements: We gratefully acknowledge the Robert A. Welch Foundation (F-0018 and 2007 to J. L. S. and Z. A. P., respective) for financial support. J. L. S. and N. M. K. acknowledge support from the King Abdullah University of Science and Technology (KAUST; grant OSR-2019-CRG8-4032). The work in Evanston was supported by the Center for the Sustainable Separation of Metals (CSSM) supported by the National Science Foundation (grant no. CHE1925708). Limited support for this work was also provided by U.S. Borax.
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