# Metal–Polymer Soft Framework Ion Gels: Linking Coordination Chemistry to Macroscopic Elasticity

https://mdr.nims.go.jp/datasets/e055bb91-2f07-4eef-a4a3-c3733d3990ac

## File

- [[Chem.Mater.]metal-polymer-soft-framework-ion-gels-linking-coordination-chemistry-to-macroscopic-elasticity.pdf](https://mdr.nims.go.jp/filesets/3c84e70f-5d74-4d27-ba91-8fef9c89c86b/download) ([Detail](https://mdr.nims.go.jp/filesets/3c84e70f-5d74-4d27-ba91-8fef9c89c86b.md))

## Id

e055bb91-2f07-4eef-a4a3-c3733d3990ac

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-07-06T23:38:01.570786Z

## Updated at

2026-07-07T00:46:23.420808Z

## Published at

2026-07-07T03:25:14.176930Z

## Doi



## First published url

https://doi.org/10.1021/acs.chemmater.6c00832

## Date published

2026-06-09

## Recorded date published

2026-6-9

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: 'Metal–Polymer Soft Framework Ion Gels: Linking Coordination Chemistry to
    Macroscopic Elasticity'
  title_type: original
  lang: en

## Description

- description: Linking molecular interactions to the macroscopic mechanical properties
    of soft materials remains a major challenge in soft-matter science. Here, we develop
    metal−polymer soft framework (MPF) ion gels, in which metal−ligand coordination
    complexes function as network-forming interchain bridges within a structurally
    homogeneous polymer network. Terpyridine-terminated TetraPEG prepolymers were
    cross-linked with divalent metal ions in an ionic liquid to form uniform coordinationbonded
    gel networks. The elastic modulus (G′) increased in the order Mg2+ < Zn2+ < Co2+
    < Ni2+, and this trend was quantitatively reproduced by modeling the equilibrium
    distribution of bis-terpyridine complexes, M(tpy)2 2+, acting as network-forming
    interchain bridges in the polymer network. By integrating coordination thermodynamics
    with classical rubber elasticity, we established a quantitative framework that
    determines the stepwise equilibrium constants (K1 and K2) for mono and bis-terpyridine
    complex formation and accurately predicts the nonmonotonic dependence of G′ on
    metal-ion concentration. Furthermore, the stress relaxation time (τ) was found
    to increase with increasing coordination bond strength, indicating that the dynamic
    mechanical response is correlated with the strength of metal−ligand interactions.
    These results establish a quantitative framework linking coordination thermodynamics
    with macroscopic gel elasticity and further suggest that coordination interactions
    also play an important role in controlling the dynamic mechanical response, providing
    a basis for tuning the properties of coordination-bonded soft materials.
  description_type: abstract
  lang: und

## Creator

- name: Yoshika Kimura
  role: author
- name: Asuka Murao
  role: author
- name: Tomoya Tashiro
  role: author
- name: Noboru Osaka
  role: author
- name: Yuji Kamiyama
  role: author
- name: Takeshi Ueki
  role: author
  orcid: https://orcid.org/0000-0001-9317-6280
- name: Kenta Fujii
  role: author
  orcid: https://orcid.org/0000-0003-0057-1295

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: ionic liquids
  schema: not_defined
- subject: gels
  schema: not_defined
- subject: ion gels
  schema: not_defined
- subject: metal-ligand coordination
  schema: not_defined
- subject: viscoelasticity
  schema: not_defined
- subject: elasticity
  schema: not_defined
- subject: supramolecular chemistry
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Chemistry of Materials
  issn: '08974756'
  volume: '38'
  issue: '11'
  start_page: 5723
  end_page: 5731

## Conference



## Related item



## Funding

- identifier: JP22H00340
  funder_name: Japan Society for the Promotion of Science
- identifier: JP23H02030
  funder_name: Japan Society for the Promotion of Science
- identifier: JP23H02066
  funder_name: Japan Society for the Promotion of Science
- identifier: JP23K26723
  funder_name: Japan Society for the Promotion of Science
- identifier: JP23K26759
  funder_name: Japan Society for the Promotion of Science

## Instrument



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## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



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## Process for specimen treatment



## Computational method



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## Fileset

- id: 3c84e70f-5d74-4d27-ba91-8fef9c89c86b
  filename: "[Chem.Mater.]metal-polymer-soft-framework-ion-gels-linking-coordination-chemistry-to-macroscopic-elasticity.pdf"
  content_type: application/pdf
  size: 3138118
  md5: 02150dc26871073ea4efe106632c1f4e

## Thumbnail

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filename: "[Chem.Mater.]metal-polymer-soft-framework-ion-gels-linking-coordination-chemistry-to-macroscopic-elasticity.pdf"