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Coordination-Driven Poly[2]Pseudorotaxanes in Highly Polar Organic Solvent.

ABSTRACT: Self-assembly of polypseudorotaxanes in high-polar organic solvents is difficult due to remarkably weak interactions between macrocycles and axles. Reported here is a novel metal-coordinated poly[2]pseudorotaxane constructed by pillar[5]arene, 1,4-bis(4-pyridyl pyridinium)butane, and [PdCl₂(PhCN)₂] in highly polar organic solvent of dimethyl sulfoxide (DMSO). Utilizing a combination of ¹H NMR, NOESY, DOSY, DLS, SEM, and viscosity measurements, the formation of polypseudorotaxane was shown to be dependent on the concentration of [2]pseudorotaxanes/[PdCl₂(PhCN)₂] and temperature. Furthermore, a temperature-responsive supramolecular gel with reversibly gel-sol transformation was obtained via spontaneous assembly of the polypseudorotaxanes at high concentrations.

SUBMITTER: Su H

PROVIDER: S-EPMC7406859 | biostudies-literature |

REPOSITORIES: biostudies-literature

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