# Supramolecular Zwitterionic Polymers: Dynamic Traits Imparted by Ionic Interactions

## TL;DR

This paper introduces a new zwitterionic monomer that simplifies the creation of supramolecular polymers with dynamic properties from ionic interactions.

## Contribution

A single-component zwitterionic monomer is proposed to form uniform supramolecular polymers with controllable dynamic behaviors.

## Key findings

- The TPE-2N2S monomer enables efficient formation of supramolecular zwitterionic polymers with uniform structures.
- Dynamic behaviors of ionic interactions are analyzed at multiple architectural levels in these polymers.
- The approach offers structural advantages and better understanding of structure–property relationships in supramolecular systems.

## Abstract

Supramolecular ionic
polymers (SIPs) exhibit distinctive dynamic
properties, which arise from the synergistic combination of substantial
strength and pronounced reversibility of ionic interactions. However,
conventional SIPs formed by coassembly using anionic and cationic
separated double monomers suffer from complicated synthesis and heterogeneous
structures, which obscure in-depth investigation of their dynamic
behaviors. In response, we developed a zwitterionic monomer, namely
TPE-2N2S, that incorporates both charged motifs into one fluorescent
tetraphenylethylene (TPE) skeleton. This zwitterionic and single-component
monomer design strategy enables the efficient formation of supramolecular
zwitterionic polymers (SZIPs) with a uniform and orderly structure,
and it can further enhance the understanding of structure–property
relationships. In this perspective, we examine the dynamic features
of ionic interactions in SZIPs, emphasizing their structural advantages,
controllable assembly, and ionic interaction characteristics. We further
investigate the dynamic behavior driven by ionic interactions at the
intramolecular, intermolecular, and supramolecular architecture levels.
Finally, we discuss key challenges and future opportunities in this
emerging field, aiming to advance the design and application of SZIPs.