5 years ago

Opposing Phase-Segregation and Hydrogen-Bonding Forces in Supramolecular Polymers

Opposing Phase-Segregation and Hydrogen-Bonding Forces in Supramolecular Polymers
Thomas Thurn-Albrecht, Tingzi Yan, Matthias Fischer, Senbin Chen, Kay Saalwächter, Anton Mordvinkin, Wolfgang H. Binder
Phase segregation between different macromolecules and specific weak interactions are the basis of molecular organization in many biological systems, which are held together by attractive hydrogen bonds (H-bonds) and dissociated by phase segregation. We report significant changes in the association behavior of covalent H-bonds by the phase of attached polymer chains. Depending on the aggregation state, we observed either intact H-bonds despite segregation of the phases, or macrophase separation with a larger amount of H-bonding dissociation. Forces to reckon with: Demixing and coupling through hydrogen bonding are two opposing forces observed in a set of supramolecular diblock copolymers. Hydrogen bonds were torn apart by phase segregation of the attached polymer chains (see picture), as shown by temperature-dependent small-angle X-ray scattering and solid-state 1H NMR spectroscopy.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201707363

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