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Solubilization of Poly1,4-phenylene-[9,9-bis(4-phenoxy-butylsulfonate)] fluoren...
Burrows, Hugh D.; Tapia, María J.; Fonseca, Sofia M.; Pradhan, Swapna; Scherf, Ullrich; Silva, Cláudia L.; Pais, Alberto A. C. C.; Valente, Artur J. M.In the presence of the nonionic alkyloxyethylene surfactant n-dodecylpentaoxyethylene glycol ether (C12E5), the anionic conjugated polyelectrolyte (CPE) poly1,4-phenylene-[9,9-bis(4-phenoxy-butylsulfonate)]fluorene-2,7-diyl (PBS-PFP) dissolves in water, leading to a blue shift in fluorescence and dramatic increases in fluorescence quantum yields above the surfactant critical micelle concentration (cmc). No sign...
Interplay of Electrostatic and Hydrophobic Effects with Binding of Cationic Gem...
Burrows, Hugh D.; Tapia, María J.; Silva, Cláudia L.; Pais, Alberto A. C. C.; Fonseca, Sofia M.; Pina, João; Melo, J. Seixas de; Wang, YujieUnderstanding factors responsible for the fluorescence behavior of conjugated polyelectrolytes and modulation of their behavior are important for their application as functional materials. The interaction between the anionic poly1,4-phenylene-[9,9-bis(4-phenoxy-butylsulfonate)]fluorene-2,7-diylcopolymer (PBS−PFP) and cationic gemini surfactants α,ω-(CmH2m+1N+(CH3)2)2(CH2)s(Br-)2 (m-s-m; m = 12, s = 2, 3, 5, 6, ...
Solubilization of Polyelectrolytic Hairy-Rod Polyfluorene in Aqueous Solutions ...
Knaapila, Matti; Almásy, László; Garamus, Vasil M.; Pearson, Christopher; Pradhan, Swapna; Petty, Michael C.; Scherf, Ullrich; Burrows, Hugh D.We report on the solubilization, phase behavior, and self-organized colloidal structure of a ternary water−polyfluorene−surfactant (amphiphile) system comprised of polyelectrolytic poly1,4-phenylene[9,9-bis(4-phenoxybutylsulfonate)]fluorene-2,7-diyl (PBS−PFP) in nonionic pentaethylene glycol monododecyl ether (C12E5) at 20 °C. We show in particular how a high amount (milligrams per milliliter) of polyfluorene c...
Interaction between the Conjugated Polyelectrolyte Poly1,4-phenylene[9,9-bis(4-...
Tapia, María J.; Burrows, Hugh D.; Knaapila, Matti; Monkman, Andrew P.; Arroyo, Antonio; Pradhan, Swapna; Scherf, Ullrich; Pinazo, AuroraIn this paper, the interaction between the water-soluble conjugated polyelectrolyte poly1,4-phenylene[9,9-bis(4-phenoxybutylsulfonate)]fluorene-2,7-diyl copolymer and the amino acid glyceride conjugate 1-O-(l-arginyl)-2,3-O-dilauroyl-sn-glycerol dichlorohydrate (a mimic for the phospholipid lecithin) has been studied in aqueous solution by electronic spectroscopy (absorption and fluorescence) and small-angle ne...
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