CUED Publications database

Cationic polythiophene-surfactant self-assembly complexes: phase transitions, optical response, and sensing.

Evans, RC and Knaapila, M and Willis-Fox, N and Kraft, M and Terry, A and Burrows, HD and Scherf, U (2012) Cationic polythiophene-surfactant self-assembly complexes: phase transitions, optical response, and sensing. Langmuir, 28. pp. 12348-12356.

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Abstract

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.

Item Type: Article
Uncontrolled Keywords: Alkanesulfonic Acids Fluorocarbons Models, Molecular Molecular Conformation Optical Phenomena Phase Transition Polymers Quaternary Ammonium Compounds Surface-Active Agents Thiophenes
Subjects: UNSPECIFIED
Divisions: Div E > Production Processes
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:05
Last Modified: 21 Sep 2017 01:35
DOI: