Effect of Counterions on the Physicomechanical Properties of Copper–Nitrogen-Coordinated Metallosupramolecular Elastomers

Abstract

Metallosupramolecular elastomers have attracted much attention due to their excellent mechanical properties, flexible tailoring of performance, and responsiveness to photo and thermal stimuli. The physicomechanical properties of metallosupramolecular elastomers are highly dependent on metal salts and ligand units; however, the role of counterions lacks practical exploration. To this end, we synthesized a simple acrylate copolymer model and introduced copper salts with different counterions to construct dynamic copper–nitrogen coordination cross-linked networks. This approach generated a series of elastomers with a tensile strength of over 10 MPa and a laser self-healing efficiency of over 90% within 2 min. In particular, we studied the effects of counterions on the thermodynamic, viscoelastic, mechanical, photothermal, and self-healing properties of the materials. Therefore, this work can provide instruction for the preparation and performance tailoring of metallosupramolecular elastomers.

Self-organization of metallo-supramolecular polymer networks by free formation of pyridine–phenanthroline heteroleptic complexes

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High Affinity of Nanoparticles and Matrices Based on Acid-Base Interaction for Nanoparticle-Filled Membrane

“…The polymerization of P1VIm-co-PBA was determined by 1 H NMR (Figure 1c). The copolymer exhibited a broad signal of the main chain at 0.96-2.2 ppm, heterocyclic ring at 6.7-7.7 ppm, and the methylene protons and methyl protons of BA at 3.5-4.1 ppm and 0.60-0.89 ppm [19,20]. Moreover, based on the integral calculations of the peak areas of a, b, c, and d, the molar content of the imidazole group was found to be 40%.…”

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