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Binding of Methylene Blue to Polyelectrolytes Containing Sulfonate Groups
Author(s) -
MorenoVilloslada Ignacio,
Torres Cristian,
González Felipe,
Shibue Toshimichi,
Nishide Hiroyuki
Publication year - 2009
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200900042
Subject(s) - polyelectrolyte , sulfonate , methylene blue , chemistry , sodium , polymer chemistry , dissociation (chemistry) , polymer , dissociation constant , macromolecule , hydrophobic effect , methylene , ionomer , copolymer , organic chemistry , biochemistry , photocatalysis , catalysis , receptor
The interaction between methylene blue (MB) and poly(sodium 4‐styrenesulfonate) (PSS), poly(sodium vinylsulfonate) (PVS), and the more hydrophobic poly[sodium 2‐( N ‐acrylamido)‐2‐methyl‐propanesulfonate] (PAMPS), is investigated. The main driving forces for the interaction with PSS are supposed to be short‐range aromatic/aromatic interactions, which explain the smaller dissociation constant, the resistance to the cleaving effect of NaCl, and the prevention of MB self‐aggregation around the macromolecules under a moderate excess of the polymer. On the contrary, as a consequence of long‐range interactions, a higher local concentration of MB around PAMPS and, more significantly, around PVS results in MB self‐aggregation that can be quenched in the presence of NaCl.