Exploring the Nanomechanical Properties of a Coordination-bond Based Supramolecular Polymer

Rui-Xiang Yao; Jun-Juan Shi; Ke-Huan Li; Xin Liu; Hou-Yu Zhang; Ming Wang; Wen-Ke Zhang

doi:10.1007/s10118-022-2797-y

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Exploring the Nanomechanical Properties of a Coordination-bond Based Supramolecular Polymer

RESEARCH ARTICLE | Updated：2022-11-16

- Exploring the Nanomechanical Properties of a Coordination-bond Based Supramolecular Polymer
- Chinese Journal of Polymer Science Vol. 40, Issue 12, Pages: 1613-1622(2022)
- Affiliations：
  
  a.State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
  b.Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
- Author bio：
  
  mingwang358@jlu.edu.cn (M.W.)
  zhangwk@jlu.edu.cn (W.K.Z.)
- Funds：
- DOI：10.1007/s10118-022-2797-y
  CLC：
- Received：29 April 2022，
  
  Revised：2022-5-5，
  
  Accepted：23 May 2022，
  
  Online First：02 September 2022，
  
  Published：01 December 2022
- Accepted：
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Yao, R. X.; Shi, J. J.; Li, K. H.; Liu, X.; Zhang, H. Y.; Wang, M.; Zhang, W. K. Exploring the nanomechanical properties of a coordination-bond based supramolecular polymer. Chinese J. Polym. Sci. 2022, 40, 1613–1622

Rui-Xiang Yao, Jun-Juan Shi, Ke-Huan Li, et al. Exploring the Nanomechanical Properties of a Coordination-bond Based Supramolecular Polymer[J]. Chinese Journal of Polymer Science, 2022, 40(12): 1613-1622.
Yao, R. X.; Shi, J. J.; Li, K. H.; Liu, X.; Zhang, H. Y.; Wang, M.; Zhang, W. K. Exploring the nanomechanical properties of a coordination-bond based supramolecular polymer. Chinese J. Polym. Sci. 2022, 40, 1613–1622 DOI： 10.1007/s10118-022-2797-y.

Rui-Xiang Yao, Jun-Juan Shi, Ke-Huan Li, et al. Exploring the Nanomechanical Properties of a Coordination-bond Based Supramolecular Polymer[J]. Chinese Journal of Polymer Science, 2022, 40(12): 1613-1622. DOI： 10.1007/s10118-022-2797-y.

摘要

The nanomechanical properties of a loop-protected metallo-supramolecular polymer was unambiguously investigated by using AFM-based single molecule force spectroscopy.

Abstract

Due to their dynamic nature and strength tunability

metallo-supramolecular polymers have been introduced into various materials. The mechanical strength of the metallo-supramolecular polymers in the system directly influences the mechanical properties (

e.g.

the toughness) of the materials. Therefore

it is necessary to explore the mechanical behavior of the metallo-supramolecular polymers. Herein

we present a single-molecule method to systematically explore the chain structure and mechanical properties of metallo-supramolecular polymer by using a loop protected architecture. Notably

we found that the mechanical stability of the individual chain

which is determined by the strength of terpyridine-Fe

-terpyridine (tpy-Fe

-tpy) bonds

was about 0.6–1.0 nN

depending on the pulling speed. This value is around three times higher than those measured using old methods. In addition

the unique loop protected structure further reduces the interference of non-specific polymer-AFM tip (or polymer-substrate) interactions on the quantification of the actual strength and kinetic parameter of noncovalent interactions in supramolecular polymers. Furthermore

the single chain flexibility of the metallo-supramolecular polymer was investigated and found to be comparable to the corresponding covalent analogues. Our findings provide a new way to explore the force response of supramolecular polymers composed of metal-ligand interactions and will be useful for the design of metallo-supramolecular polymer-based functional materials with tailored mechanical properties.

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references

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