Influence of the linear aromatic density on methylene blue aggregation around polyanions containing sulfonate groups

Autor:	Ignacio Moreno-Villoslada, Rodrigo Araya-Hermosilla, César Torres-Gallegos, Hiroyuki Nishide
Jazyk:	angličtina
Rok vydání:	2010
Předmět:	Sodium chemistry.chemical_element Polyelectrolyte Surfaces Coatings and Films chemistry.chemical_compound Diafiltration Sulfonate chemistry MBAS assay Materials Chemistry Proton NMR Physical and Theoretical Chemistry Methylene blue Nuclear chemistry
Zdroj:	JOURNAL OF PHYSICAL CHEMISTRY B Artículos CONICYT CONICYT Chile instacron:CONICYT
Popis:	The aggregation of methylene blue around different polyelectrolytes is studied by diafiltration, UV-vis, and (1)H NMR spectroscopies. Poly(sodium acrylate-co-sodium maleate) induces the formation of higher-order aggregates, showing a typical polyelectrolyte behavior dominated by long-range electrostatic interactions with the dye which are highly dependent on the ionic strength. Poly(sodium 4-styrenesulfonate) presents a high dispersant ability of methylene blue, showing what we can call a typical polyaromatic-anion behavior characterized by the presence of short-range aromatic-aromatic interactions with the dye which are less dependent on the ionic strength. An intermediate behavior is found for the copolymers poly(sodium 4-styrenesulfonate-co-sodium maleate) at two different comonomer compositions, related to a different probability of the polymers to form and stabilize ion pairs in hydrophobic environments. Their behavior is a function of the linear aromatic density, which is related to the comonomeric structure.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::281eb51d0212907d1c8eedc3149dfbc1 Zobrazit plný text záznamu