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dc.contributor.authorCosta, T.*
dc.contributor.authorde Azevedo, D.*
dc.contributor.authorStewart, Beverly*
dc.contributor.authorKnaapila, M.*
dc.contributor.authorValente, A.J.M.*
dc.contributor.authorKraft, M.*
dc.contributor.authorScherf, U.*
dc.contributor.authorBurrows, H.D.*
dc.date.accessioned2019-05-30T11:25:21Z
dc.date.available2019-05-30T11:25:21Z
dc.date.issued2015-12-15
dc.identifier.citationCosta T, de Azevedo D, Stewart B et al (2015) Interactions of a zwitterionic thiophene-based conjugated polymer with surfactants. 6(46): 8036-8046.en_US
dc.identifier.urihttp://hdl.handle.net/10454/17086
dc.descriptionYesen_US
dc.description.abstractIn this paper we investigate the optical and structural properties of a zwitterionic poly[3-(N-(4-sulfonato-1-butyl)-N,N-diethylammonium)hexyl-2,5-thiophene] (P3SBDEAHT) conjugated polyelectrolyte (CPE) and its interaction in water with surfactants, using absorption, photoluminescence (PL), electrical conductivity, molecular dynamics simulations (MDS) and small-angle X-ray scattering (SAXS). Different surfactants were studied to evaluate the effect of the head group and chain length on the self-assembly. PL data emphasize the importance of polymer–surfactant electrostatic interactions in the formation of complexes. Nevertheless, conductivity and MDS data have shown that nonspecific interactions also play an important role. These seem to be responsible for the spatial position of the surfactant tail in the complex and, eventually, for breaking-up P3SBDEAHT aggregates. SAXS measurements on P3SBDEAHT-zwitterionic cocamidopropyl betaine (CAPB) surfactant complexes showed a specific structural organization of the system. The CAPB surfactant promotes a structural transition from pure P3SBDEAHT 3-dimensional aggregates (radius of gyration ∼85 Å) to thick cylindrical aggregates (∼20 Å) where all CAPB molecules are associated with the polymer. For molar ratios (in terms of the polymer repeat unit) >1 the SAXS interference maximum of the complexes resembles that of pure CAPB thus suggesting ongoing phase segregation in the formation of a “pure” CAPB phase.en_US
dc.description.sponsorshipThe Coimbra Chemistry Centre is supported by the Fundação para a Ciência e a Tecnologia (FCT), Portuguese Agency for Scientific Research, through the project PEst-OE/QUI/UI0313/2014. TC and BS thank FCT, which has supported this work through Postdoctoral Grants (SFRH/BPD/47181/2008 and SFRH/BPD/82396/2011, respectively). DA acknowledges CNPq, Conselho Nacional de Desenvolvimento Científico e Tecnológico – Brasil, for financial support through the Grant “Bolsista do CNPq – Brasil”. The research leading to the SAXS data has received funding from the European Community's Seventh Framework Programme (FP7/2007–2013) CALIPSO under grant agreement no. 312284.en_US
dc.language.isoenen_US
dc.rights(c) 2015 The Authors. This is an Open Access article distributed under the Creative Commons CC-BY license (http://creativecommons.org/licenses/by/3.0/)en_US
dc.subjectOptical propertiesen_US
dc.subjectStructural propertiesen_US
dc.subjectZwitterionic thiophene-based conjugated polymeren_US
dc.subjectSurfactantsen_US
dc.titleInteractions of a zwitterionic thiophene-based conjugated polymer with surfactantsen_US
dc.status.refereedYesen_US
dc.date.Accepted2015-09-23
dc.date.application2015-09-25
dc.typeArticleen_US
dc.type.versionPublished versionen_US
dc.identifier.doihttps://doi.org/10.1039/C5PY01210D
refterms.dateFOA2019-05-30T11:25:21Z


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