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Mixed Conductive Soft Solids by Electrostatically Driven Network Formation of a Conjugated Polyelectrolyte.
- Source :
-
Chemistry of Materials . 2/27/2018, Vol. 30 Issue 4, p1417-1426. 10p. - Publication Year :
- 2018
-
Abstract
- A conjugated polyelectrolyte (poly[2,6-(4,4-bis-potassium butanylsulfonate-4H-cyclopenta-[2,1-b;3,4-b']-dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)], PCPDTBT-SO3K) assembles into a novel, hierarchical hydrogel structure with all structural evidence indicating dominant electrostatic rather than aromatic or mesogen interactions. PCPDTBT-SO3K forms an entangled polymer mesh, where polymer chains are tied together by ionic cross-links, comprising microgel clusters that percolate to form a macroscopic three-dimensional network. With increasing temperature, ions gain mobility to move toward the exterior of the microgel clusters, dissolving the ionic cross-links and inhibiting network percolation through electrostatic repulsion. While π-π stacking interactions may be present in a disorganized fashion, no long-range π-π stacking is evident in X-ray scattering. Soft materials based on PCPDTBT-SO3K remain semiconducting and exhibit elevated ionic conductivity at the structural reorganization temperature. [ABSTRACT FROM AUTHOR]
- Subjects :
- *POLYELECTROLYTES
*MESOGENS
*X-ray scattering
Subjects
Details
- Language :
- English
- ISSN :
- 08974756
- Volume :
- 30
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Chemistry of Materials
- Publication Type :
- Academic Journal
- Accession number :
- 128251174
- Full Text :
- https://doi.org/10.1021/acs.chemmater.7b05303