Combination of phosphonium and ammonium pendant groups in cationic conjugated polyelectrolytes based on regioregular poly(3-hexylthiophene) polymer chains. (March 2018)

• Record Type: Journal Article
• Authors: Hladysh, Sviatoslav; Murmiliuk, Anastasiia; Vohlídal, Jiří; Havlíček, David; Sedlařík, Vladimír; Štěpánek, Miroslav; Zedník, Jiří
• Is Part Of: European polymer journal. Volume 100(2018)
• Page Start: 200
• Page End: 208
• Publication Date: 2018-03
• Subjects: Conjugated polymers -- Conjugated polyelectrolytes -- Polythiophene -- Photoluminescence quenching -- Stern-Volmer constant; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; Polymerization; Polymers; Periodicals; Electronic journals; 547.705
• DOI: 10.1016/j.eurpolymj.2018.01.029
• Languages: English
• ISSNs: 0014-3057

Abstract

Graphical abstract: Highlights: Polythiophene-based polyelectrolytes were prepared by simple quaternization reaction. Polyelectrolytes with ammonium and phosphonium pendant groups were synthesized. The effect of phosphonium and ammonium pendants on optical properties was assessed. Fluorescence quenching by model pollutants was investigated using the Stern-Volmer method. Abstract: A series of novel polythiophene-based cationic conjugated polyelectrolytes with phosphonium and ammonium pendants were prepared by modifying regioregular poly[3-(6-bromohexyl)thiophene] using a simple quaternization reaction with appropriate phosphine or amine. Partial transformation of the bromide end-groups of the polymer precursor with amine allowed adding the phosphine agent, thereby enabling quantitative transformation into a novel conjugated polyelectrolyte with phosphonium and ammonium groups in the same polymer main-chains. The properties of the synthesized polyelectrolytes in solution (water, methanol, DMSO and chloroform) were analyzed by UV/vis, luminescence, NMR, light scattering and TGA measurements. To test the prepared polyelectrolytes as potential luminescence sensors, fluorescence quenching measurements were performed in water, using K4 [Fe(CN)6 ] and K3 [Fe(CN)6 ] as quenchers. This study showed that polyelectrolytes containing both types of ionic pendant groups (phosphonium and ammonium) are more efficiently quenched.