期刊
MACROMOLECULAR CHEMISTRY AND PHYSICS
卷 210, 期 13-14, 页码 1167-1175出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.200900042
关键词
Interactions; methylene blue; polyelectrolytes; poly(sodium 4-styrenesulfonate)
资金
- Fondecyt [1090341]
- MEXT, Japan
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-aggreation that can be g quenched in the presence of NaCl.
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