Issue 15, 2023

Fluorescent copolymer aggregate sensor for lithium chloride


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-calix[4]pyrrole or secondary ammonium groups that drive aggregation via self-assembly upon polymer mixing. Addition of LiCl in acetonitrile disrupts the strapped-calix[4]pyrrole/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.

Graphical abstract: Fluorescent copolymer aggregate sensor for lithium chloride

Supplementary files

Article information

Article type
Edge Article
23 Sep 2022
22 Mar 2023
First published
22 Mar 2023
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2023,14, 4120-4125

Fluorescent copolymer aggregate sensor for lithium chloride

H. Wang, L. O. Jones, T. Zhao, I. Hwang, V. M. Lynch, N. M. Khashab, G. C. Schatz, Z. A. Page and J. L. Sessler, Chem. Sci., 2023, 14, 4120 DOI: 10.1039/D2SC05342J

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity