Opposing Phase‐Segregation and Hydrogen‐Bonding Forces in Supramolecular Polymers. Issue 42 (11th September 2017)

• Record Type: Journal Article
• Authors: Chen, Senbin; Yan, Tingzi; Fischer, Matthias; Mordvinkin, Anton; Saalwächter, Kay; Thurn‐Albrecht, Thomas; Binder, Wolfgang H.
• Is Part Of: Angewandte Chemie international edition. Volume 56:Issue 42(2017)
• Page Start: 13016
• Page End: 13020
• Publication Date: 2017-09-11
• Subjects: hydrogen bonds -- interaction parameters -- order–disorder transitions -- phase diagrams -- phase segregation; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201707363
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: 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. Abstract : 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 1 H NMR spectroscopy.