Cationic Polythiophene–Surfactant Self-Assembly Complexes: Phase Transitions, Optical Response, and Sensing
The absorption and photoluminescence spectra of the cationic conjugated polyelectrolyte poly[3-(6-trimethylammoniumhexyl)thiophene] (P3TMAHT) were observed to be dramatically altered in the presence of anionic surfactants due to self-assembly through ionic complex formation. Small-angle neutron scat...
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| Veröffentlicht in: | Langmuir 2012-08, Vol.28 (33), p.12348-12356 |
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| creator | Evans, Rachel C Knaapila, Matti Willis-Fox, Niamh Kraft, Mario Terry, Ann Burrows, Hugh D Scherf, Ullrich |
| description | The absorption and photoluminescence spectra of the cationic conjugated polyelectrolyte poly[3-(6-trimethylammoniumhexyl)thiophene] (P3TMAHT) were observed to be dramatically altered in the presence of anionic surfactants due to self-assembly through ionic complex formation. Small-angle neutron scattering (SANS), UV/vis, and photoluminescence spectroscopy were used to probe the relationship between the supramolecular complex organization and the photophysical response of P3TMAHT in the presence of industrially important anionic surfactants. Subtle differences in the surfactant mole fraction and chemical structure (e.g., chain length, headgroup charge density, perfluorination) result in marked variations in the range and type of complexes formed, which can be directly correlated to a unique colorimetric and fluorimetric fingerprint. Our results show that P3TMAHT has potential as an optical sensor for anionic surfactants capable of selectively identifying distinct structural subgroups through dual mode detection. |
| doi_str_mv | 10.1021/la302166a |
| format | Article |
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Small-angle neutron scattering (SANS), UV/vis, and photoluminescence spectroscopy were used to probe the relationship between the supramolecular complex organization and the photophysical response of P3TMAHT in the presence of industrially important anionic surfactants. Subtle differences in the surfactant mole fraction and chemical structure (e.g., chain length, headgroup charge density, perfluorination) result in marked variations in the range and type of complexes formed, which can be directly correlated to a unique colorimetric and fluorimetric fingerprint. 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| source | MEDLINE; American Chemical Society Journals |
| subjects | Alkanesulfonic Acids - chemistry Chemistry Exact sciences and technology Fluorocarbons - chemistry General and physical chemistry Models, Molecular Molecular Conformation Optical Phenomena Phase Transition Polymers - chemistry Quaternary Ammonium Compounds - chemistry Surface-Active Agents - chemistry Thiophenes - chemistry |
| title | Cationic Polythiophene–Surfactant Self-Assembly Complexes: Phase Transitions, Optical Response, and Sensing |
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