Multi-Scale Assembly of Polythiophene-Surfactant Supramolecular Complexes for Charge Transport Anisotropy
| Autor: | Manesh Gopinadhan, Thanh Vy Pham, Amrita Sarkar, Cameron Danesh, Chinedum O. Osuji, Gregory A. Braggin, David Bilger, Jose A. Figueroa, Morgan Stefik, Yashas Rao, Danielle Chun, Shanju Zhang |
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| Rok vydání: | 2017 |
| Předmět: |
Persistence length
Materials science Polymers and Plastics Organic Chemistry Supramolecular chemistry Ionic bonding 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorescence spectroscopy 0104 chemical sciences Condensed Matter::Soft Condensed Matter Inorganic Chemistry chemistry.chemical_compound Crystallography Pulmonary surfactant chemistry Chromism Materials Chemistry Polythiophene Absorption (chemistry) 0210 nano-technology |
| Zdroj: | Macromolecules. 50:1047-1055 |
| ISSN: | 1520-5835 0024-9297 |
| Popis: | Multiscale assembly of poly(3-alkylthiophene)s complexed with various alkyl-chain surfactant architectures has been investigated in dilute and concentrated solutions by means of ultraviolet–visible absorption and fluorescence spectroscopy, polarized optical microscopy, small-angle X-ray scattering, and four-point probe conductivity measurements. Supramolecular complexation occurs via ionic interactions between poly(3-alkylthiophene)s electrolytes and ionic surfactants. In dilute solutions, the supramolecular complex undergoes a coil-to-rod conformational transition as evidenced by a time-dependent chromism. Spectroscopic studies on transition kinetics reveal an inverse first-order rate law. While surfactant architectures significantly affect the persistence length of the complexes, the inverse first-order rate law is maintained. When concentrated above a critical value, the supramolecular complex exhibits an isotropic-to-liquid crystalline transition yielding hexagonally ordered microstructures. The liqui... |
| Databáze: | OpenAIRE |
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