Counterion-Mediated Hydrogen Bonding Making Strong Polyelectrolytes pH-Responsive: Current Understanding and Perspectives

Yue Huang; Guang-Tao Mei; Zan Hua; Guang-Ming Liu

doi:10.1007/s10118-024-3115-7

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Counterion-Mediated Hydrogen Bonding Making Strong Polyelectrolytes pH-Responsive: Current Understanding and Perspectives

PERSPECTIVE | Updated：2024-08-27

- Counterion-Mediated Hydrogen Bonding Making Strong Polyelectrolytes pH-Responsive: Current Understanding and Perspectives
- Chinese Journal of Polymer Science Vol. 42, Issue 9, Pages: 1270-1277(2024)
- Affiliations：
  
  a.Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemical Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei 230026, China
  b.The Key Laboratory of Functional Molecular Solids, Ministry of Education, and Department of Materials Chemistry, School of Chemistry and Materials Science, Anhui Normal University, Wuhu 214002, China
- Author bio：
  
  zanhua23@ahnu.edu.cn (Z.H.)
  gml@ustc.edu.cn (G.M.L.)
- Funds：
- DOI：10.1007/s10118-024-3115-7
  CLC：
- Received：09 February 2024，
  
  Revised：2024-02-29，
  
  Accepted：06 March 2024，
  
  Online First：16 April 2024，
  
  Published：01 September 2024
- Accepted：
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Huang, Y.; Mei, G. T.; Hua, Z.; Liu, G. M. Counterion-mediated hydrogen bonding making strong polyelectrolytes pH-responsive: current understanding and perspectives. Chinese J. Polym. Sci. 2024, 42, 1270–1277

Yue Huang, Guang-Tao Mei, Zan Hua, et al. Counterion-Mediated Hydrogen Bonding Making Strong Polyelectrolytes pH-Responsive: Current Understanding and Perspectives[J]. Chinese Journal of Polymer Science, 2024, 42(9): 1270-1277.
Huang, Y.; Mei, G. T.; Hua, Z.; Liu, G. M. Counterion-mediated hydrogen bonding making strong polyelectrolytes pH-responsive: current understanding and perspectives. Chinese J. Polym. Sci. 2024, 42, 1270–1277 DOI： 10.1007/s10118-024-3115-7.

Yue Huang, Guang-Tao Mei, Zan Hua, et al. Counterion-Mediated Hydrogen Bonding Making Strong Polyelectrolytes pH-Responsive: Current Understanding and Perspectives[J]. Chinese Journal of Polymer Science, 2024, 42(9): 1270-1277. DOI： 10.1007/s10118-024-3115-7.

摘要

Based on the pH-controlled counterion-mediated hydrogen bond interactions

the pH responsiveness of strong polyelectrolytes is expected to be observed in different polyelectrolyte systems including solutions

brushes

and gels.

Abstract

The counterion-mediated hydrogen bonding (CMHB) is related to the hydrogen bonding between bound counterions and polyelectrolyte chains in polyelectrolyte systems

where the counterions can both electrostatically bind to the charged groups of polyelectrolyte chains and act as hydrogen bond donors or acceptors to form hydrogen bonds with the hydrogen bond sites associated with polyelectrolyte chains simultaneously. A large number of literatures illustrate that strong polyelectrolytes (SPs) are insensitive to pH

which severely limmits the applications of SPs as smart materials. However

our studies have demonstrated that the CMHB makes SPs pH-responsive. This perspective discusses the mechanism of pH responsiveness of SPs and the pH-tunable properties of SPs

based on the pH-controlled CMHB effect. The future research directions on the pH responsiveness of SPs are also discussed here. It is anticipated that the study of the pH responsiveness of SPs not only will provide a new understanding of the fundamental properties of SPs

but also will greatly expand the applications of SPs in the field of smart materials.

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references

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